CVE-2025-11468

NameCVE-2025-11468
DescriptionWhen folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email messages where addresses are user-controlled and not sanitized.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-4455-1
Debian Bugs1126786, 1126787, 1126788

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
jython (PTS)bullseye2.7.2+repack1-3fixed
forky, sid, bookworm, trixie2.7.3+repack1-1fixed
pypy3 (PTS)bullseye7.3.5+dfsg-2+deb11u2vulnerable
bullseye (security)7.3.5+dfsg-2+deb11u5vulnerable
bookworm7.3.11+dfsg-2+deb12u3vulnerable
trixie7.3.19+dfsg-2vulnerable
forky, sid7.3.20+dfsg-4vulnerable
python2.7 (PTS)bullseye2.7.18-8+deb11u1fixed
python3.11 (PTS)bookworm3.11.2-6+deb12u6vulnerable
bookworm (security)3.11.2-6+deb12u3vulnerable
python3.13 (PTS)trixie3.13.5-2vulnerable
forky, sid3.13.12-1fixed
python3.14 (PTS)forky, sid3.14.3-1fixed
python3.9 (PTS)bullseye3.9.2-1vulnerable
bullseye (security)3.9.2-1+deb11u5fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
jythonsource(unstable)(not affected)
pypy3source(unstable)(unfixed)1126788
python2.7source(unstable)(not affected)
python3.11source(unstable)(unfixed)
python3.13source(unstable)3.13.12-11126787
python3.14source(unstable)3.14.3-11126786
python3.9sourcebullseye3.9.2-1+deb11u5DLA-4455-1
python3.9source(unstable)(unfixed)

Notes

- python2.7 <not-affected> (E-mail folding API introduced in Python 3.3)
[trixie] - pypy3 <no-dsa> (Minor issue)
[bookworm] - pypy3 <no-dsa> (Minor issue)
[bullseye] - pypy3 <postponed> (Minor issue)
- jython <not-affected> (Vulnerable code not present)
https://github.com/python/cpython/issues/143935
https://github.com/python/cpython/pull/143936
Fixed by: https://github.com/python/cpython/commit/17d1490aa97bd6b98a42b1a9b324ead84e7fd8a2 (main)
Fixed by: https://github.com/python/cpython/commit/61614a5e5056e4f61ced65008d4576f3df34acb6 (3.14 branch)
Fixed by: https://github.com/python/cpython/commit/f738386838021c762efea6c9802c82de65e87796 (3.13 branch)
Fixed by: https://github.com/python/cpython/commit/e9970f077240c7c670e8a6fc6662f2b30d3b6ad0 (3.11 branch)

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