RHSA-2026:13845

Vulnerability from csaf_redhat - Published: 2026-05-05 18:15 - Updated: 2026-05-05 20:33
Summary
Red Hat Security Advisory: webkit2gtk3 security update
Severity
Important
Notes
Topic: An update for webkit2gtk3 is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: WebKitGTK is the port of the portable web rendering engine WebKit to the GTK platform. Security Fix(es): * webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash (CVE-2025-43213) * webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash (CVE-2025-43214) * webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash (CVE-2025-43457) * webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2025-43511) * webkitgtk: Processing maliciously crafted web content may disclose internal states of the app (CVE-2025-46299) * webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-20608) * webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-20635) * webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-20636) * webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-20644) * webkitgtk: A remote attacker may be able to cause a denial-of-service (CVE-2026-20652) * webkitgtk: A website may be able to track users through Safari web extensions (CVE-2026-20676) * webkitgtk: Processing maliciously crafted web content may bypass Same Origin Policy (CVE-2026-20643) * webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-20664) * webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced (CVE-2026-20665) * webkitgtk: A maliciously crafted webpage may be able to fingerprint the user (CVE-2026-20691) * webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28857) * webkitgtk: A malicious website may be able to process restricted web content outside the sandbox (CVE-2026-28859) * webkitgtk: Visiting a maliciously crafted website may lead to a cross-site scripting attack (CVE-2026-28871) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
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CVE-2025-43213

A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2025-43214

A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2025-43457

A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to improper memory management and result in an unexpected process crash.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-416 - Use After Free
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2025-43511

A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to improper memory management and result in an unexpected process crash.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-416 - Use After Free
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2025-46299

A flaw was found in WebKitGTK. Processing malicious web content can cause a memory initialization issue due to improper memory handling and result in the disclosure of the internal states of the application.

6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE-909 - Missing Initialization of Resource
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2026-20608

A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper state management.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2026-20635

A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2026-20636

A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2026-20643

A flaw was found in WebKitGTK. Processing malicious web content can cause a cross-origin issue in the Navigation API due to improper input validation and result in a bypass of the same origin policy.

5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CWE-346 - Origin Validation Error
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2026-20644

A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2026-20652

A flaw was found in WebKitGTK. A remote attacker may be able to cause a denial-of-service due to improper memory handling.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.
CVE-2026-20664

A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2026-20665

A flaw was found in WebKitGTK. Processing malicious web content may prevent Content Security Policy from being enforced due to improper state management.

5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
CWE-693 - Protection Mechanism Failure
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2026-20676

A flaw was found in WebKitGTK. A malicious website can track users through web extensions due to improper state management.

4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CWE-201 - Insertion of Sensitive Information Into Sent Data
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not visit untrusted websites. Also, do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2026-20691

A flaw was found in WebKitGTK. A maliciously crafted web page can cause an authorization issue due to improper state management and may be able to fingerprint the user.

4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CWE-497 - Exposure of Sensitive System Information to an Unauthorized Control Sphere
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not visit untrusted web pages or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2026-28857

A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2026-28859

A flaw was found in WebKitGTK. A maliciously crafted web page may be able to process restricted web content outside the sandbox due to improper memory handling.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not visit untrusted web pages or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
CVE-2026-28871

A flaw was found in WebKitGTK. A maliciously crafted web page can cause a logic issue due to improper checks and result in a cross-site scripting attack.

4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:13845
Workaround Do not visit untrusted web pages or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
References
https://access.redhat.com/errata/RHSA-2026:13845 self
https://access.redhat.com/security/updates/classi… external
https://bugzilla.redhat.com/show_bug.cgi?id=2448781 external
https://bugzilla.redhat.com/show_bug.cgi?id=2448782 external
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https://bugzilla.redhat.com/show_bug.cgi?id=2453008 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2025-43213 self
https://bugzilla.redhat.com/show_bug.cgi?id=2448781 external
https://www.cve.org/CVERecord?id=CVE-2025-43213 external
https://nvd.nist.gov/vuln/detail/CVE-2025-43213 external
https://webkitgtk.org/security/WSA-2026-0001.html external
https://access.redhat.com/security/cve/CVE-2025-43214 self
https://bugzilla.redhat.com/show_bug.cgi?id=2448782 external
https://www.cve.org/CVERecord?id=CVE-2025-43214 external
https://nvd.nist.gov/vuln/detail/CVE-2025-43214 external
https://access.redhat.com/security/cve/CVE-2025-43457 self
https://bugzilla.redhat.com/show_bug.cgi?id=2448786 external
https://www.cve.org/CVERecord?id=CVE-2025-43457 external
https://nvd.nist.gov/vuln/detail/CVE-2025-43457 external
https://access.redhat.com/security/cve/CVE-2025-43511 self
https://bugzilla.redhat.com/show_bug.cgi?id=2448787 external
https://www.cve.org/CVERecord?id=CVE-2025-43511 external
https://nvd.nist.gov/vuln/detail/CVE-2025-43511 external
https://access.redhat.com/security/cve/CVE-2025-46299 self
https://bugzilla.redhat.com/show_bug.cgi?id=2448788 external
https://www.cve.org/CVERecord?id=CVE-2025-46299 external
https://nvd.nist.gov/vuln/detail/CVE-2025-46299 external
https://access.redhat.com/security/cve/CVE-2026-20608 self
https://bugzilla.redhat.com/show_bug.cgi?id=2448789 external
https://www.cve.org/CVERecord?id=CVE-2026-20608 external
https://nvd.nist.gov/vuln/detail/CVE-2026-20608 external
https://access.redhat.com/security/cve/CVE-2026-20635 self
https://bugzilla.redhat.com/show_bug.cgi?id=2448790 external
https://www.cve.org/CVERecord?id=CVE-2026-20635 external
https://nvd.nist.gov/vuln/detail/CVE-2026-20635 external
https://access.redhat.com/security/cve/CVE-2026-20636 self
https://bugzilla.redhat.com/show_bug.cgi?id=2448791 external
https://www.cve.org/CVERecord?id=CVE-2026-20636 external
https://nvd.nist.gov/vuln/detail/CVE-2026-20636 external
https://access.redhat.com/security/cve/CVE-2026-20643 self
https://bugzilla.redhat.com/show_bug.cgi?id=2453000 external
https://www.cve.org/CVERecord?id=CVE-2026-20643 external
https://nvd.nist.gov/vuln/detail/CVE-2026-20643 external
https://webkitgtk.org/security/WSA-2026-0002.html external
https://access.redhat.com/security/cve/CVE-2026-20644 self
https://bugzilla.redhat.com/show_bug.cgi?id=2448792 external
https://www.cve.org/CVERecord?id=CVE-2026-20644 external
https://nvd.nist.gov/vuln/detail/CVE-2026-20644 external
https://access.redhat.com/security/cve/CVE-2026-20652 self
https://bugzilla.redhat.com/show_bug.cgi?id=2448793 external
https://www.cve.org/CVERecord?id=CVE-2026-20652 external
https://nvd.nist.gov/vuln/detail/CVE-2026-20652 external
https://access.redhat.com/security/cve/CVE-2026-20664 self
https://bugzilla.redhat.com/show_bug.cgi?id=2453001 external
https://www.cve.org/CVERecord?id=CVE-2026-20664 external
https://nvd.nist.gov/vuln/detail/CVE-2026-20664 external
https://access.redhat.com/security/cve/CVE-2026-20665 self
https://bugzilla.redhat.com/show_bug.cgi?id=2453002 external
https://www.cve.org/CVERecord?id=CVE-2026-20665 external
https://nvd.nist.gov/vuln/detail/CVE-2026-20665 external
https://access.redhat.com/security/cve/CVE-2026-20676 self
https://bugzilla.redhat.com/show_bug.cgi?id=2448794 external
https://www.cve.org/CVERecord?id=CVE-2026-20676 external
https://nvd.nist.gov/vuln/detail/CVE-2026-20676 external
https://access.redhat.com/security/cve/CVE-2026-20691 self
https://bugzilla.redhat.com/show_bug.cgi?id=2453003 external
https://www.cve.org/CVERecord?id=CVE-2026-20691 external
https://nvd.nist.gov/vuln/detail/CVE-2026-20691 external
https://access.redhat.com/security/cve/CVE-2026-28857 self
https://bugzilla.redhat.com/show_bug.cgi?id=2453004 external
https://www.cve.org/CVERecord?id=CVE-2026-28857 external
https://nvd.nist.gov/vuln/detail/CVE-2026-28857 external
https://access.redhat.com/security/cve/CVE-2026-28859 self
https://bugzilla.redhat.com/show_bug.cgi?id=2453006 external
https://www.cve.org/CVERecord?id=CVE-2026-28859 external
https://nvd.nist.gov/vuln/detail/CVE-2026-28859 external
https://access.redhat.com/security/cve/CVE-2026-28871 self
https://bugzilla.redhat.com/show_bug.cgi?id=2453008 external
https://www.cve.org/CVERecord?id=CVE-2026-28871 external
https://nvd.nist.gov/vuln/detail/CVE-2026-28871 external
To clipboard 

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          "text": "A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.",
          "title": "Vulnerability description"
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          "title": "Vulnerability summary"
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          "text": "To exploit this issue, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with an important severity.\nAdditionally, this issue can cause an unexpected process crash but the possibility of remote code execution is not discarded.",
          "title": "Statement"
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        {
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this issue, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with an important severity.\nAdditionally, this issue can cause an unexpected process crash but the possibility of remote code execution is not discarded.",
          "title": "Statement"
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          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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      "cwe": {
        "id": "CWE-416",
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          "title": "Vulnerability description"
        },
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          "category": "summary",
          "text": "webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this issue, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with an important severity.\nAdditionally, this issue can cause an unexpected process crash but the possibility of remote code execution is not discarded.",
          "title": "Statement"
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          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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      "cwe": {
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          "title": "Vulnerability description"
        },
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          "category": "summary",
          "text": "webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this issue, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with an important severity.\nAdditionally, this issue can cause an unexpected process crash but the possibility of remote code execution is not discarded.",
          "title": "Statement"
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          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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      "cwe": {
        "id": "CWE-909",
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          "category": "description",
          "text": "A flaw was found in WebKitGTK. Processing malicious web content can cause a memory initialization issue due to improper memory handling and result in the disclosure of the internal states of the application.",
          "title": "Vulnerability description"
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        {
          "category": "summary",
          "text": "webkitgtk: Processing maliciously crafted web content may disclose internal states of the app",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this flaw, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with a moderate severity.",
          "title": "Statement"
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        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "details": "Moderate"
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      "title": "webkitgtk: Processing maliciously crafted web content may disclose internal states of the app"
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    {
      "cve": "CVE-2026-20608",
      "cwe": {
        "id": "CWE-120",
        "name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
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      "discovery_date": "2026-03-18T20:17:02.437000+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2448789"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper state management.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this issue, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with an important severity.\nAdditionally, this issue can cause an unexpected process crash but the possibility of remote code execution is not discarded.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "text": "A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this issue, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with an important severity.\nAdditionally, this issue can cause an unexpected process crash but the possibility of remote code execution is not discarded.",
          "title": "Statement"
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        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "text": "A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this issue, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with an important severity.\nAdditionally, this issue can cause an unexpected process crash but the possibility of remote code execution is not discarded.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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      "cwe": {
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        "name": "Origin Validation Error"
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          "text": "2453000"
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          "text": "A flaw was found in WebKitGTK. Processing malicious web content can cause a cross-origin issue in the Navigation API due to improper input validation and result in a bypass of the same origin policy.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "webkitgtk: Processing maliciously crafted web content may bypass Same Origin Policy",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this flaw, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with a moderate severity.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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      "title": "webkitgtk: Processing maliciously crafted web content may bypass Same Origin Policy"
    },
    {
      "cve": "CVE-2026-20644",
      "cwe": {
        "id": "CWE-120",
        "name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
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      "discovery_date": "2026-03-18T20:20:25.753000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2448792"
        }
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        {
          "category": "description",
          "text": "A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this issue, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with an important severity.\nAdditionally, this issue can cause an unexpected process crash but the possibility of remote code execution is not discarded.",
          "title": "Statement"
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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        "id": "CWE-120",
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          "title": "Vulnerability description"
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          "text": "webkitgtk: A remote attacker may be able to cause a denial-of-service",
          "title": "Vulnerability summary"
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        {
          "category": "other",
          "text": "This issue allows a remote attacker to cause a denial of service. Due to this reason, this flaw has been rated with an important severity.",
          "title": "Statement"
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          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "title": "Vulnerability description"
        },
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          "text": "webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this issue, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with an important severity.\nAdditionally, this issue can cause an unexpected process crash but the possibility of remote code execution is not discarded.",
          "title": "Statement"
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        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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      "cwe": {
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          "title": "Vulnerability description"
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        {
          "category": "summary",
          "text": "webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this flaw, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with a moderate severity.",
          "title": "Statement"
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        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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    {
      "cve": "CVE-2026-20676",
      "cwe": {
        "id": "CWE-201",
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      "ids": [
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          "text": "2448794"
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        {
          "category": "description",
          "text": "A flaw was found in WebKitGTK. A malicious website can track users through web extensions due to improper state management.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "webkitgtk: A website may be able to track users through Safari web extensions",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this flaw, an attacker needs to trick a user into visiting a malicious website. Due to this reason, this flaw has been rated with a moderate severity.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "title": "Vulnerability description"
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          "text": "webkitgtk: A maliciously crafted webpage may be able to fingerprint the user",
          "title": "Vulnerability summary"
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          "text": "To exploit this flaw, an attacker needs to trick a user into visiting a maliciously crafted web page. Due to this reason, this flaw has been rated with a moderate severity.",
          "title": "Statement"
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "title": "Vulnerability description"
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          "title": "Vulnerability summary"
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          "text": "To exploit this issue, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with an important severity.\nAdditionally, this issue can cause an unexpected process crash but the possibility of remote code execution is not discarded.",
          "title": "Statement"
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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        "name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
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          "title": "Vulnerability description"
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          "text": "webkitgtk: A malicious website may be able to process restricted web content outside the sandbox",
          "title": "Vulnerability summary"
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        {
          "category": "other",
          "text": "To exploit this flaw, an attacker needs to trick a user into visiting a maliciously crafted web page. Due to this reason, this flaw has been rated with an important severity.",
          "title": "Statement"
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        {
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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      "cwe": {
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        "name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
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          "text": "2453008"
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          "category": "description",
          "text": "A flaw was found in WebKitGTK. A maliciously crafted web page can cause a logic issue due to improper checks and result in a cross-site scripting attack.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "webkitgtk: Visiting a maliciously crafted website may lead to a cross-site scripting attack",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this flaw, an attacker needs to trick a user into visiting a maliciously crafted web page. Due to this reason, this flaw has been rated with a moderate severity.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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            "AppStream-8.6.0.Z.TUS:webkit2gtk3-jsc-devel-0:2.52.3-1.el8_6.x86_64",
            "AppStream-8.6.0.Z.TUS:webkit2gtk3-jsc-devel-debuginfo-0:2.52.3-1.el8_6.i686",
            "AppStream-8.6.0.Z.TUS:webkit2gtk3-jsc-devel-debuginfo-0:2.52.3-1.el8_6.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "webkitgtk: Visiting a maliciously crafted website may lead to a cross-site scripting attack"
    }
  ]
}


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Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.