Common Weakness Enumeration
CWE-59
AllowedImproper Link Resolution Before File Access ('Link Following')
Abstraction: Base · Status: Draft
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
2244 vulnerabilities reference this CWE, most recent first.
CVE-2026-2808 (GCVE-0-2026-2808)
Vulnerability from cvelistv5 – Published: 2026-03-11 23:08 – Updated: 2026-04-17 17:57
VLAI
EPSS
VEX
Title
Consul vulnerable to arbitrary file reads through the vault kubernetes authentication provider
Summary
HashiCorp Consul and Consul Enterprise 1.18.20 up to 1.21.10 and 1.22.4 are vulnerable to arbitrary file read when configured with Kubernetes authentication. This vulnerability, CVE-2026-2808, is fixed in Consul 1.18.21, 1.21.11 and 1.22.5.
Severity
6.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-12 13:28 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access (Link Following)
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| HashiCorp | Consul |
Affected:
0 , < 1.22.5
(semver)
|
|
| HashiCorp | Consul Enterprise |
Affected:
0 , < 1.22.5
(semver)
|
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CVE-2026-2627 (GCVE-0-2026-2627)
Vulnerability from cvelistv5 – Published: 2026-02-17 21:32 – Updated: 2026-02-23 10:16
VLAI
EPSS
VEX
Title
Softland FBackup Backup/Restore HID.dll link following
Summary
A security flaw has been discovered in Softland FBackup up to 9.9. This impacts an unknown function in the library C:\Program Files\Common Files\microsoft shared\ink\HID.dll of the component Backup/Restore. The manipulation results in link following. The attack needs to be approached locally. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-18 20:37 UTC
CWE
- CWE-59 - Link Following
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.346279 | vdb-entry |
| https://vuldb.com/?ctiid.346279 | signaturepermissions-required |
| https://vuldb.com/?submit.752050 | third-party-advisory |
| https://github.com/thezdi/PoC/tree/main/FilesystemEoPs | exploit |
Impacted products
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CVE-2026-2490 (GCVE-0-2026-2490)
Vulnerability from cvelistv5 – Published: 2026-02-20 22:24 – Updated: 2026-02-24 15:16
VLAI
EPSS
VEX
Title
RustDesk Client for Windows Transfer File Link Following Information Disclosure Vulnerability
Summary
RustDesk Client for Windows Transfer File Link Following Information Disclosure Vulnerability. This vulnerability allows local attackers to disclose sensitive information on affected installations of RustDesk Client for Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the Transfer File feature. By uploading a symbolic link, an attacker can abuse the service to read arbitrary files. An attacker can leverage this vulnerability to disclose information in the context of SYSTEM. Was ZDI-CAN-27909.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-24 15:14 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_research-advisory |
| https://github.com/rustdesk/rustdesk/pull/13736 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RustDesk | Client for Windows |
Affected:
1.4.1
|
Date Public
2026-02-19 14:20
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CVE-2026-0827 (GCVE-0-2026-0827)
Vulnerability from cvelistv5 – Published: 2026-04-15 12:27 – Updated: 2026-04-15 13:48
VLAI
EPSS
VEX
Summary
During an internal security assessment, a potential vulnerability was discovered in Lenovo Diagnostics and the HardwareScanAddin used in Lenovo Vantage that, during installation or when using hardware scan, could allow a local authenticated user to perform an arbitrary file write with elevated privileges.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-15 13:46 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Lenovo | Diagnostics |
Affected:
0 , < 5.26.0
(custom)
cpe:2.3:a:lenovo:diagnostics:*:*:*:*:*:*:*:* |
|
| Lenovo | Vantage |
Affected:
0 , < 4.7.1.4
(custom)
cpe:2.3:a:lenovo:vantage:*:*:*:*:*:*:*:* |
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GCVE-1988-2026-0351
Vulnerability from gna-1988 – Published: 2026-09-11 07:55 – Updated: 2026-09-11 07:55
VLAI
EPSS
VEX
Title
pwnlift: symlink following and TOCTOU in privileged upload handler allow arbitrary file write as root
Summary
1. Advisory information
-----------------------
Title: Symlink following and TOCTOU in pwnlift upload handler allow arbitrary file write as root
Advisory: https://github.com/GregDurys/security-advisories
GHSA: GHSA-2v7v-rhpw-m9w4
CVE: CVE-2026-56815
Class: CWE-59 (Improper Link Resolution Before File Access),
CWE-367 (Time-of-check Time-of-use Race Condition)
CVSS: 7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Date: 2026-06-27
Author: Greg Durys <https://github.com/GregDurys>
2. Affected software
--------------------
Project: pwnlift
Repository: https://github.com/rasta-mouse/pwnlift
Runtime: .NET / Blazor (ASP.NET Core, Kestrel)
Component: pwnlift/Components/Pages/Home.razor
Tested: commit 211f2b3 (2025-08-29)
Fix: d7a95449d9ee1ea09ec1529286685f6187afbbed (merged 2026-06-18),
(initial remediation e3eddac addresses CWE-59 but not CWE-367)
3. Testing scope
----------------
All exploitation testing was performed in a local testbed. The known
affected downstream lab deployment has been mitigated by removing the
privileged sudo entry. The upstream follow-up fix has been merged.
4. Summary
----------
pwnlift is a small .NET/Blazor file upload server. Its upload handler
constructs the destination path from the caller's working directory
(Directory.GetCurrentDirectory()) and writes uploaded files without
validating symlinks, canonicalising paths, or sanitising filenames.
When pwnlift runs as root via sudo without a cwd= directive, a local
user can exploit this in two ways:
(a) Symlink following (CWE-59): pre-stage an Uploads symlink
pointing at a privileged directory. The elevated process follows
the symlink and writes uploaded files into the target.
(b) TOCTOU bypass of initial fix (CWE-367): the initial fix added
a ReparsePoint check and StartsWith containment. Because the
destination is still caller-controlled, a race script alternates
Uploads between a real directory (passes the check) and a symlink
(catches the write). The StartsWith check has a separate flaw:
prefix matching without a trailing separator means
/tmp/Uploads-evil passes StartsWith("/tmp/Uploads").
Both variants achieve arbitrary file write as root. For example,
writing to a privileged configuration path such as /etc/sudoers.d/
can grant the attacker full passwordless sudo.
5. Remediation
--------------
Replace Directory.GetCurrentDirectory() with AppContext.BaseDirectory.
Enforce path containment with Path.GetRelativePath rather than
StartsWith. Retain the ReparsePoint check as defence in depth. Ensure
the application directory and Uploads are root-owned and not writable
by lower-privileged users. If Uploads already exists as a symlink,
remove and recreate it as a real directory before applying ownership
changes.
6. Disclosure timeline
----------------------
2026-04-30 Privileged deployment observed during normal lab usage
2026-05-07 Initial contact with upstream maintainer
2026-05-08 Reproduced end-to-end in local testbed; reported to upstream maintainer and downstream deployment operator
2026-05-12 Initial fix committed upstream (e3eddac) with reporter credit
2026-05-19 Downstream operator declined CVE on CNA scope grounds
2026-05-20 TOCTOU bypass reproduced and reported to maintainer
2026-05-28 Downstream operator confirmed lab patched, sudo removed
2026-05-30 CVE requested via GHSA
2026-06-09 GitHub rejected CVE request
2026-06-09 GHSA re-review requested
2026-06-15 CVE request submitted to MITRE
2026-06-18 Follow-up fix merged upstream; CVE re-requested via GHSA
2026-06-19 GitHub rejected second CVE request
2026-06-22 GHSA advisory published without a CVE
2026-06-23 Advisory posted to oss-security
2026-06-23 MITRE assigned CVE-2026-56815
7. Current status
-----------------
Downstream deployment: patched (sudo entry removed, 28 May 2026)
Upstream final fix: merged (d7a9544, 18 June 2026)
CVE: CVE-2026-56815 (assigned by MITRE, 23 June 2026)
8. References
-------------
- https://github.com/rasta-mouse/pwnlift
- https://github.com/rasta-mouse/pwnlift/commit/e3eddaca42b4b3e9c69f2d7aa024b6c82e27a5a2
- https://github.com/rasta-mouse/pwnlift/commit/d7a95449d9ee1ea09ec1529286685f6187afbbed
- https://github.com/rasta-mouse/pwnlift/security/advisories/GHSA-2v7v-rhpw-m9w4
- https://www.openwall.com/lists/oss-security/2026/06/23/2
- https://github.com/GregDurys/security-advisories
- https://payloadforge.io/beyond-crto-pwnlift/
_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: https://seclists.org/fulldisclosure/
Severity
No CVSS data available.
Assigner
References
12 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| unknown | pwnlift symlink following |
Affected:
unknown
|
Relationships
reference
GCVE-1988-2026-0351 (this record)
- related CVE-2026-56815
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CVE-2026-0291 (GCVE-0-2026-0291)
Vulnerability from cvelistv5 – Published: 2026-08-13 01:47 – Updated: 2026-08-13 13:23
VLAI
EPSS
VEX
Title
Prisma Access Agent: Authenticated Limited File Deletion on Linux
Summary
An improper link resolution before file access vulnerability exists in the Palo Alto Networks Prisma® Access Agent on Linux platforms that enables a local low privileged user to delete system files in a limited scope and disable Prisma Access Agent.
The Prisma Access Agent on macOS, Windows, iOS, Android, and Chrome OS is not affected.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 13:21 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.paloaltonetworks.com/CVE-2026-0291 | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Palo Alto Networks | Prisma Access Agent |
Affected:
0 , < 26.2.2
(custom)
|
|
| Palo Alto Networks | Prisma Access Agent |
Unaffected:
All
(custom)
|
Date Public
2026-08-12 16:00
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GCVE-1988-2026-0095
Vulnerability from gna-1988 – Published: 2026-09-07 13:20 – Updated: 2026-09-07 13:20
VLAI
EPSS
VEX
Title
pwnlift: symlink following and TOCTOU in privileged upload handler allow arbitrary file write as root
Summary
1. Advisory information
-----------------------
Title: Symlink following and TOCTOU in pwnlift upload handler allow arbitrary file write as root
Advisory: https://github.com/GregDurys/security-advisories
GHSA: GHSA-2v7v-rhpw-m9w4
CVE: CVE-2026-56815
Class: CWE-59 (Improper Link Resolution Before File Access),
CWE-367 (Time-of-check Time-of-use Race Condition)
CVSS: 7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Date: 2026-06-27
Author: Greg Durys <https://github.com/GregDurys>
2. Affected software
--------------------
Project: pwnlift
Repository: https://github.com/rasta-mouse/pwnlift
Runtime: .NET / Blazor (ASP.NET Core, Kestrel)
Component: pwnlift/Components/Pages/Home.razor
Tested: commit 211f2b3 (2025-08-29)
Fix: d7a95449d9ee1ea09ec1529286685f6187afbbed (merged 2026-06-18),
(initial remediation e3eddac addresses CWE-59 but not CWE-367)
3. Testing scope
----------------
All exploitation testing was performed in a local testbed. The known
affected downstream lab deployment has been mitigated by removing the
privileged sudo entry. The upstream follow-up fix has been merged.
4. Summary
----------
pwnlift is a small .NET/Blazor file upload server. Its upload handler
constructs the destination path from the caller's working directory
(Directory.GetCurrentDirectory()) and writes uploaded files without
validating symlinks, canonicalising paths, or sanitising filenames.
When pwnlift runs as root via sudo without a cwd= directive, a local
user can exploit this in two ways:
(a) Symlink following (CWE-59): pre-stage an Uploads symlink
pointing at a privileged directory. The elevated process follows
the symlink and writes uploaded files into the target.
(b) TOCTOU bypass of initial fix (CWE-367): the initial fix added
a ReparsePoint check and StartsWith containment. Because the
destination is still caller-controlled, a race script alternates
Uploads between a real directory (passes the check) and a symlink
(catches the write). The StartsWith check has a separate flaw:
prefix matching without a trailing separator means
/tmp/Uploads-evil passes StartsWith("/tmp/Uploads").
Both variants achieve arbitrary file write as root. For example,
writing to a privileged configuration path such as /etc/sudoers.d/
can grant the attacker full passwordless sudo.
5. Remediation
--------------
Replace Directory.GetCurrentDirectory() with AppContext.BaseDirectory.
Enforce path containment with Path.GetRelativePath rather than
StartsWith. Retain the ReparsePoint check as defence in depth. Ensure
the application directory and Uploads are root-owned and not writable
by lower-privileged users. If Uploads already exists as a symlink,
remove and recreate it as a real directory before applying ownership
changes.
6. Disclosure timeline
----------------------
2026-04-30 Privileged deployment observed during normal lab usage
2026-05-07 Initial contact with upstream maintainer
2026-05-08 Reproduced end-to-end in local testbed; reported to upstream maintainer and downstream deployment operator
2026-05-12 Initial fix committed upstream (e3eddac) with reporter credit
2026-05-19 Downstream operator declined CVE on CNA scope grounds
2026-05-20 TOCTOU bypass reproduced and reported to maintainer
2026-05-28 Downstream operator confirmed lab patched, sudo removed
2026-05-30 CVE requested via GHSA
2026-06-09 GitHub rejected CVE request
2026-06-09 GHSA re-review requested
2026-06-15 CVE request submitted to MITRE
2026-06-18 Follow-up fix merged upstream; CVE re-requested via GHSA
2026-06-19 GitHub rejected second CVE request
2026-06-22 GHSA advisory published without a CVE
2026-06-23 Advisory posted to oss-security
2026-06-23 MITRE assigned CVE-2026-56815
7. Current status
-----------------
Downstream deployment: patched (sudo entry removed, 28 May 2026)
Upstream final fix: merged (d7a9544, 18 June 2026)
CVE: CVE-2026-56815 (assigned by MITRE, 23 June 2026)
8. References
-------------
- https://github.com/rasta-mouse/pwnlift
- https://github.com/rasta-mouse/pwnlift/commit/e3eddaca42b4b3e9c69f2d7aa024b6c82e27a5a2
- https://github.com/rasta-mouse/pwnlift/commit/d7a95449d9ee1ea09ec1529286685f6187afbbed
- https://github.com/rasta-mouse/pwnlift/security/advisories/GHSA-2v7v-rhpw-m9w4
- https://www.openwall.com/lists/oss-security/2026/06/23/2
- https://github.com/GregDurys/security-advisories
- https://payloadforge.io/beyond-crto-pwnlift/
_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: https://seclists.org/fulldisclosure/
Severity
No CVSS data available.
Assigner
References
12 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| unknown | pwnlift symlink following |
Affected:
unknown
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CVE-2025-71212 (GCVE-0-2025-71212)
Vulnerability from cvelistv5 – Published: 2026-05-21 13:02 – Updated: 2026-05-21 14:09
VLAI
EPSS
VEX
Summary
A link following vulnerability in the Trend Micro Apex One scan engine could allow a local attacker to escalate privileges on affected installations.
Please note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-21 14:08 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Trend Micro, Inc. | TrendAI Apex One |
Affected:
2019 (14.0) , < 14.0.0.14136
(semver)
cpe:2.3:a:trendmicro:apexone_op:14.0.0.14136:*:*:*:*:*:*:* |
|
| Trend Micro, Inc. | TrendAI Apex One as a Service |
Affected:
SaaS , < 14.0.20315
(semver)
cpe:2.3:a:trendmicro:apexone_saas:14.0.0.20315:*:*:*:*:*:*:* |
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CVE-2025-68279 (GCVE-0-2025-68279)
Vulnerability from cvelistv5 – Published: 2025-12-18 22:59 – Updated: 2025-12-19 15:02
VLAI
EPSS
VEX
Title
Weblate has an arbitrary file read via symbolic links
Summary
Weblate is a web based localization tool. In versions prior to 5.15.1, it was possible to read arbitrary files from the server file system using crafted symbolic links in the repository. Version 5.15.1 fixes the issue.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-19 15:01 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/WeblateOrg/weblate/security/ad… | x_refsource_CONFIRM |
| https://github.com/WeblateOrg/weblate/pull/17331 | x_refsource_MISC |
| https://github.com/WeblateOrg/weblate/pull/17356 | x_refsource_MISC |
| https://github.com/WeblateOrg/weblate/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| WeblateOrg | weblate |
Affected:
< 5.15.1
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CVE-2025-68146 (GCVE-0-2025-68146)
Vulnerability from cvelistv5 – Published: 2025-12-16 18:10 – Updated: 2025-12-17 18:51
VLAI
EPSS
VEX
Title
filelock has TOCTOU race condition that allows symlink attacks during lock file creation
Summary
filelock is a platform-independent file lock for Python. In versions prior to 3.20.1, a Time-of-Check-Time-of-Use (TOCTOU) race condition allows local attackers to corrupt or truncate arbitrary user files through symlink attacks. The vulnerability exists in both Unix and Windows lock file creation where filelock checks if a file exists before opening it with O_TRUNC. An attacker can create a symlink pointing to a victim file in the time gap between the check and open, causing os.open() to follow the symlink and truncate the target file. All users of filelock on Unix, Linux, macOS, and Windows systems are impacted. The vulnerability cascades to dependent libraries. The attack requires local filesystem access and ability to create symlinks (standard user permissions on Unix; Developer Mode on Windows 10+). Exploitation succeeds within 1-3 attempts when lock file paths are predictable. The issue is fixed in version 3.20.1. If immediate upgrade is not possible, use SoftFileLock instead of UnixFileLock/WindowsFileLock (note: different locking semantics, may not be suitable for all use cases); ensure lock file directories have restrictive permissions (chmod 0700) to prevent untrusted users from creating symlinks; and/or monitor lock file directories for suspicious symlinks before running trusted applications. These workarounds provide only partial mitigation. The race condition remains exploitable. Upgrading to version 3.20.1 is strongly recommended.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-17 14:51 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tox-dev/filelock/security/advi… | x_refsource_CONFIRM |
| https://github.com/tox-dev/filelock/pull/461 | x_refsource_MISC |
| https://github.com/tox-dev/filelock/commit/4724d7… | x_refsource_MISC |
| https://github.com/tox-dev/filelock/releases/tag/3.20.1 | x_refsource_MISC |
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Mitigation MIT-48.1
Architecture and Design
Strategy: Separation of Privilege
- Follow the principle of least privilege when assigning access rights to entities in a software system.
- Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
CAPEC-132: Symlink Attack
An adversary positions a symbolic link in such a manner that the targeted user or application accesses the link's endpoint, assuming that it is accessing a file with the link's name.
CAPEC-17: Using Malicious Files
An attack of this type exploits a system's configuration that allows an adversary to either directly access an executable file, for example through shell access; or in a possible worst case allows an adversary to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
CAPEC-35: Leverage Executable Code in Non-Executable Files
An attack of this type exploits a system's trust in configuration and resource files. When the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high.
CAPEC-76: Manipulating Web Input to File System Calls
An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.