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[3.6] Security fixes for CVE-2026-6100 and CVE-2026-4786 #145

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stratakis merged 2 commits intofedora-python:fedora-3.6from
stratakis:3.6-cves-for-ever
Apr 23, 2026
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[3.6] Security fixes for CVE-2026-6100 and CVE-2026-4786 #145
stratakis merged 2 commits intofedora-python:fedora-3.6from
stratakis:3.6-cves-for-ever

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Fix webbrowser `%action` substitution bypass of dash-prefix check

Backported from Python 3.10
Fix a possible UAF in {LZMA,BZ2,_Zlib}Decompressor

Backported from Python 3.10
@hroncok
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hroncok commented Apr 21, 2026

For CVE-2026-6100, is there no change required for Modules/zlibmodule.c ?

@stratakis
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For CVE-2026-6100, is there no change required for Modules/zlibmodule.c ?

Nope, the vulnerable class in zlibmodule was introduced with Python 3.12, hence why also the 3.9, 3.10, 3.11 backports also don't have a fix there.

@stratakis stratakis merged commit 4aa3813 into fedora-python:fedora-3.6 Apr 23, 2026
@stratakis stratakis deleted the 3.6-cves-for-ever branch April 23, 2026 01:12
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3 participants