CVE-2025-1795

During an address list folding when a separating comma ends up on a folded line and that line is to be unicode-encoded then the separator itself is also unicode-encoded. Expected behavior is that the separating comma remains a plan comma. This can result in the address header being misinterpreted by some mail servers.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
UNKNOWN
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PSFCNA
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CISA-ADPADP
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Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 40%
Debian logo
Debian Releases
Debian Product
Codename
pypy3
bullseye
postponed
bookworm
no-dsa
bullseye (security)
vulnerable
trixie
7.3.19+dfsg-2
fixed
forky
7.3.20+dfsg-2
fixed
sid
7.3.20+dfsg-2
fixed
python3.11
bookworm
3.11.2-6+deb12u6
no-dsa
bullseye
postponed
bookworm (security)
vulnerable
python3.13
trixie
3.13.5-2
fixed
bookworm
no-dsa
bullseye
postponed
forky
3.13.7-1
fixed
sid
3.13.7-1
fixed
python3.9
bullseye
postponed
bookworm
no-dsa
bullseye (security)
3.9.2-1+deb11u3
fixed
Common Weakness Enumeration
References
https://github.com/python/cpython/commit/09fab93c3d857496c0bd162797fab816c311ee48
https://github.com/python/cpython/commit/70754d21c288535e86070ca7a6e90dcb670b8593
https://github.com/python/cpython/commit/9148b77e0af91cdacaa7fe3dfac09635c3fe9a74
https://github.com/python/cpython/issues/100884
https://github.com/python/cpython/pull/100885
https://github.com/python/cpython/pull/119099
https://mail.python.org/archives/list/security-announce@python.org/thread/MB62IZMEC3UM6SGHP5LET5JX2Y7H4ZUR/