CVE-2026-4519 (GCVE-0-2026-4519)

Vulnerability from cvelistv5 – Published: 2026-03-20 15:08 – Updated: 2026-06-30 12:10
VLAI
Title
webbrowser.open() allows leading dashes in URLs
Summary
The webbrowser.open() API would accept leading dashes in the URL which could be handled as command line options for certain web browsers. New behavior rejects leading dashes. Users are recommended to sanitize URLs prior to passing to webbrowser.open().
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-20 - Improper Input Validation
  • CWE-88 - Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Assigner
PSF
References
URL Tags
https://github.com/python/cpython/pull/143931 patch
https://github.com/python/cpython/issues/143930 issue-tracking
https://mail.python.org/archives/list/security-an… vendor-advisory
https://github.com/python/cpython/commit/43fe06b9… patch
https://github.com/python/cpython/commit/82a24a44… patch
https://github.com/python/cpython/commit/9669a912… patch
https://github.com/python/cpython/commit/ad4d5ba3… patch
https://github.com/python/cpython/commit/ceac1efc… patch
https://github.com/python/cpython/commit/cbba6119… patch
https://github.com/python/cpython/commit/3681d47a… patch
https://github.com/python/cpython/commit/591ed890… patch
https://github.com/python/cpython/commit/594b5a05… patch
https://github.com/python/cpython/commit/89bfb8e5… patch
https://github.com/python/cpython/commit/96fc5048… patch
https://github.com/python/cpython/commit/cc023511… patch
http://www.openwall.com/lists/oss-security/2026/03/20/1
https://access.redhat.com/security/cve/CVE-2026-4519 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2449649 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:10102 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9614 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9745 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:13812 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7244 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6256 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19064 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19019 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6473 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6281 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6283 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9387 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9621 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9386 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9289 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9591 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9261 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9262 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9260 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:10101 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9042 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:10111 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9354 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9705 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7010 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6766 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6286 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6285 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19216 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19175 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19177 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19176 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25096 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7335 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19724 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19725 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:16008 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8748 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8746 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:16030 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8747 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:16009 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:16174 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7329 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:10140 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:10141 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6016 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6035 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7443 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7661 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:21275 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:10065 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
Python Software Foundation CPython Affected: 0 , < 3.13.13 (python)
Affected: 3.14.0 , < 3.14.4 (python)
Affected: 3.15.0a1 , < 3.15.0a8 (python)
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Red Hat Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)     cpe:/o:redhat:rhel_els:6
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Red Hat Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)     cpe:/o:redhat:rhel_els:6
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Red Hat Red Hat Enterprise Linux Server (v. 7 ELS)     cpe:/o:redhat:rhel_els:7
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Red Hat Red Hat Enterprise Linux Server Optional (v. 7 ELS)     cpe:/o:redhat:rhel_els:7
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Red Hat Middleware Containers for OpenShift     cpe:/a:redhat:rhosemc:1.0::el8
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Red Hat Red Hat Enterprise Linux AppStream EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux AppStream (v. 10)     cpe:/o:redhat:enterprise_linux:10.1
    cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux AppStream (v. 8)     cpe:/a:redhat:enterprise_linux:8::appstream
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Red Hat Red Hat Enterprise Linux AppStream AUS (v. 8.2)     cpe:/a:redhat:rhel_aus:8.2::appstream
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Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.4)     cpe:/a:redhat:rhel_aus:8.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)     cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.6)     cpe:/a:redhat:rhel_aus:8.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.8.6)     cpe:/a:redhat:rhel_e4s:8.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream TUS (v.8.6)     cpe:/a:redhat:rhel_tus:8.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.8.8)     cpe:/a:redhat:rhel_e4s:8.8::appstream
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Red Hat Red Hat Enterprise Linux AppStream TUS (v.8.8)     cpe:/a:redhat:rhel_tus:8.8::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.0)     cpe:/a:redhat:rhel_e4s:9.0::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.4)     cpe:/a:redhat:rhel_eus:9.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream (v. 9)     cpe:/a:redhat:enterprise_linux:9::appstream
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Red Hat Red Hat Enterprise Linux BaseOS EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux BaseOS (v. 10)     cpe:/o:redhat:enterprise_linux:10.1
    cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux BaseOS (v. 8)     cpe:/o:redhat:enterprise_linux:8::baseos
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Red Hat Red Hat Enterprise Linux BaseOS AUS (v. 8.2)     cpe:/o:redhat:rhel_aus:8.2::baseos
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Red Hat Red Hat Enterprise Linux BaseOS AUS (v.8.4)     cpe:/o:redhat:rhel_aus:8.4::baseos
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Red Hat Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)     cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
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Red Hat Red Hat Enterprise Linux BaseOS AUS (v.8.6)     cpe:/o:redhat:rhel_aus:8.6::baseos
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Red Hat Red Hat Enterprise Linux BaseOS E4S (v.8.6)     cpe:/o:redhat:rhel_e4s:8.6::baseos
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Red Hat Red Hat Enterprise Linux BaseOS TUS (v.8.6)     cpe:/o:redhat:rhel_tus:8.6::baseos
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Red Hat Red Hat Enterprise Linux BaseOS E4S (v.8.8)     cpe:/o:redhat:rhel_e4s:8.8::baseos
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Red Hat Red Hat Enterprise Linux BaseOS TUS (v.8.8)     cpe:/o:redhat:rhel_tus:8.8::baseos
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Red Hat Red Hat Enterprise Linux BaseOS E4S (v.9.0)     cpe:/o:redhat:rhel_e4s:9.0::baseos
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Red Hat Red Hat Enterprise Linux BaseOS E4S (v.9.2)     cpe:/o:redhat:rhel_e4s:9.2::baseos
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Red Hat Red Hat Enterprise Linux BaseOS EUS (v.9.4)     cpe:/o:redhat:rhel_eus:9.4::baseos
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Red Hat Red Hat Enterprise Linux BaseOS EUS (v.9.6)     cpe:/o:redhat:rhel_eus:9.6::baseos
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Red Hat Red Hat Enterprise Linux BaseOS (v. 9)     cpe:/o:redhat:enterprise_linux:9::baseos
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Red Hat Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)     cpe:/o:redhat:enterprise_linux:10.1
    cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux CRB (v. 8)     cpe:/a:redhat:enterprise_linux:8::crb
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Red Hat Red Hat CodeReady Linux Builder EUS (v.9.4)     cpe:/a:redhat:rhel_eus:9.4::crb
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Red Hat Red Hat CodeReady Linux Builder EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::crb
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Red Hat Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)     cpe:/a:redhat:enterprise_linux:9::crb
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Red Hat Red Hat AI Inference Server 3.2     cpe:/a:redhat:ai_inference_server:3.2::el9
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Red Hat Red Hat AI Inference Server 3.3     cpe:/a:redhat:ai_inference_server:3.3::el9
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Red Hat Red Hat Discovery 2     cpe:/a:redhat:discovery:2::el9
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Red Hat Red Hat Enterprise Linux AI 3.3     cpe:/a:redhat:enterprise_linux_ai:3.3::el9
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Red Hat Red Hat Hardened Images     cpe:/a:redhat:hummingbird:1
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Red Hat Red Hat Update Infrastructure 5     cpe:/a:redhat:rhui:5::el9
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Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
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Credits
Seth Larson Gregory P. Smith an7y
Show details on NVD website

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}


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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.

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Detection rules are retrieved from Rulezet.

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