Arbitrary Argument Injection The advisory has been revoked - it doesn't affect any version of package python3-tkinter (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL7-PYTHON3TKINTER-16086120
- published16 Apr 2026
- disclosed13 Apr 2026
Introduced: 13 Apr 2026
CVE-2026-4786 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:7.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python3-tkinter package and not the python3-tkinter package as distributed by RHEL.
Mitgation of CVE-2026-4519 was incomplete. If the URL contained "%action" the mitigation could be bypassed for certain browser types the "webbrowser.open()" API could have commands injected into the underlying shell. See CVE-2026-4519 for details.
References
- https://access.redhat.com/security/cve/CVE-2026-4786
- https://github.com/python/cpython/issues/148169
- https://github.com/python/cpython/pull/148170
- https://mail.python.org/archives/list/security-announce@python.org/thread/JQDUNJVB4AQNTJECSUKOBDU3XCJIPSE5/
- https://github.com/python/cpython/commit/c5767a72838a8dda9d6dc5d3558075b055c56bca
- https://github.com/python/cpython/commit/d22922c8a7958353689dc4763dd72da2dea03fff
- https://github.com/python/cpython/commit/f4654824ae0850ac87227fb270f9057477946769
- https://github.com/python/cpython/commit/28b4ad38067bbdad34edfcd03ad2de5f06387e53
- https://github.com/python/cpython/commit/d6d68494be70bdbda20f89f83801ba52ec37daa4