CVE-2025-1795
CVE-2025-1795 · Mishandling of comma during folding and unicode-encoding of email headers
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 2.3 · Low · EPSS 0.6% · Fix available
- Published
- Updated
Affected products and versions
python
- Versions
- ≥ 0, < 3.9.23: Affected (python)
- ≥ 3.10.0, < 3.10.17: Affected (python)
- ≥ 3.11.0, < 3.11.9: Affected (python)
- ≥ 3.12.0, < 3.12.3: Affected (python)
- ≥ 3.13.0a1, < 3.13.0a5: Affected (python)
Update to 3.10.17; Update to 3.11.9; Update to 3.12.3; Update to 3.13.0a5; Update to 3.9.23
pypy3 Debian:12
- Versions
- 7.3.11+dfsg-2
- 7.3.11+dfsg-2+deb12u1
- 7.3.11+dfsg-2+deb12u2
- 7.3.11+dfsg-2+deb12u3
- 7.3.12+dfsg-1
- 7.3.12~rc1+dfsg-1
- 7.3.12~rc2+dfsg-1
- 7.3.13+dfsg-1
- 7.3.14+dfsg-1
- 7.3.15+dfsg-1
- 7.3.16+dfsg-1
- 7.3.16+dfsg-2
- 7.3.17+dfsg-1
- 7.3.17+dfsg-2
- 7.3.17+dfsg-3
- 7.3.18+dfsg-1
- 7.3.18+dfsg-2
- 7.3.19+dfsg-1
- 7.3.19+dfsg-2
- 7.3.20+dfsg-1
- 7.3.20+dfsg-2
- 7.3.20+dfsg-3
- 7.3.20+dfsg-4
- 7.3.21+dfsg-1
- 7.3.21+dfsg-2
- 7.3.21+dfsg-3
- 7.3.21+dfsg-4
- 7.3.22+dfsg-1
- 7.3.23+dfsg-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
pypy3 Debian:13
- Affected ranges
- ECOSYSTEM: < 7.3.18+dfsg-1
Update to 7.3.18+dfsg-1
pypy3 Debian:14
- Affected ranges
- ECOSYSTEM: < 7.3.18+dfsg-1
Update to 7.3.18+dfsg-1
python3.11 Debian:12
- Versions
- 3.11.2-6
- 3.11.2-6+deb12u1
- 3.11.2-6+deb12u2
- 3.11.2-6+deb12u3
- 3.11.2-6+deb12u4
- 3.11.2-6+deb12u5
- Affected ranges
- ECOSYSTEM: < 3.11.2-6+deb12u6
Update to 3.11.2-6+deb12u6
python3.13 Debian:13
- Affected ranges
- ECOSYSTEM: < 3.13.0~b1-1
Update to 3.13.0~b1-1
python3.13 Debian:14
- Affected ranges
- ECOSYSTEM: < 3.13.0~b1-1
Update to 3.13.0~b1-1
python3.4 Ubuntu:Pro:14.04:LTS
- Versions
- 3.4~b1-0ubuntu3
- 3.4~b1-4ubuntu4
- 3.4~b1-4ubuntu6
- 3.4~b1-5ubuntu2
- 3.4~b2-1
- 3.4~b3-1ubuntu1
- 3.4~rc1-1build1
- 3.4~rc2-1
- 3.4~rc3-0ubuntu1
- 3.4.0-1
- 3.4.0-2ubuntu1
- 3.4.0-2ubuntu1.1
- 3.4.3-1ubuntu1~14.04.1
- 3.4.3-1ubuntu1~14.04.3
- 3.4.3-1ubuntu1~14.04.4
- 3.4.3-1ubuntu1~14.04.5
- 3.4.3-1ubuntu1~14.04.6
- 3.4.3-1ubuntu1~14.04.7
- 3.4.3-1ubuntu1~14.04.7+esm2
- 3.4.3-1ubuntu1~14.04.7+esm4
- 3.4.3-1ubuntu1~14.04.7+esm6
- 3.4.3-1ubuntu1~14.04.7+esm7
- 3.4.3-1ubuntu1~14.04.7+esm8
- 3.4.3-1ubuntu1~14.04.7+esm10
- 3.4.3-1ubuntu1~14.04.7+esm11
- 3.4.3-1ubuntu1~14.04.7+esm12
- 3.4.3-1ubuntu1~14.04.7+esm13
- 3.4.3-1ubuntu1~14.04.7+esm14
- 3.4.3-1ubuntu1~14.04.7+esm15
- 3.4.3-1ubuntu1~14.04.7+esm16
- 3.4.3-1ubuntu1~14.04.7+esm17
- 3.4.3-1ubuntu1~14.04.7+esm19
- 3.4.3-1ubuntu1~14.04.7+esm20
- 3.4.3-1ubuntu1~14.04.7+esm21
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python3.5 Ubuntu:Pro:14.04:LTS
- Versions
- 3.5.2-2ubuntu0~16.04.4~14.04.1
- 3.5.2-2ubuntu0~16.04.4~14.04.1+esm1
- 3.5.2-2ubuntu0~16.04.4~14.04.1+esm3
- 3.5.2-2ubuntu0~16.04.4~14.04.1+esm4
- 3.5.2-2ubuntu0~16.04.4~14.04.1+esm5
- 3.5.2-2ubuntu0~16.04.4~14.04.1+esm6
- 3.5.2-2ubuntu0~16.04.4~14.04.1+esm7
- 3.5.2-2ubuntu0~16.04.4~14.04.1+esm8
- 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
- 3.5.2-2ubuntu0~16.04.4~14.04.1+esm10
- 3.5.2-2ubuntu0~16.04.4~14.04.1+esm11
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python3.5 Ubuntu:Pro:16.04:LTS
- Versions
- 3.5.0-3
- 3.5.0-3ubuntu1
- 3.5.1~rc1-2ubuntu1
- 3.5.1-1
- 3.5.1-2
- 3.5.1-3
- 3.5.1-5
- 3.5.1-6ubuntu1
- 3.5.1-6ubuntu2
- 3.5.1-9ubuntu1
- 3.5.1-10
- 3.5.2-2~16.01
- 3.5.2-2~16.04
- 3.5.2-2ubuntu0~16.04.1
- 3.5.2-2ubuntu0~16.04.2
- 3.5.2-2ubuntu0~16.04.3
- 3.5.2-2ubuntu0~16.04.4
- 3.5.2-2ubuntu0~16.04.5
- 3.5.2-2ubuntu0~16.04.8
- 3.5.2-2ubuntu0~16.04.9
- 3.5.2-2ubuntu0~16.04.10
- 3.5.2-2ubuntu0~16.04.11
- 3.5.2-2ubuntu0~16.04.12
- 3.5.2-2ubuntu0~16.04.13
- 3.5.2-2ubuntu0~16.04.13+esm1
- 3.5.2-2ubuntu0~16.04.13+esm2
- 3.5.2-2ubuntu0~16.04.13+esm3
- 3.5.2-2ubuntu0~16.04.13+esm5
- 3.5.2-2ubuntu0~16.04.13+esm6
- 3.5.2-2ubuntu0~16.04.13+esm7
- 3.5.2-2ubuntu0~16.04.13+esm8
- 3.5.2-2ubuntu0~16.04.13+esm9
- 3.5.2-2ubuntu0~16.04.13+esm10
- 3.5.2-2ubuntu0~16.04.13+esm11
- 3.5.2-2ubuntu0~16.04.13+esm12
- 3.5.2-2ubuntu0~16.04.13+esm13
- 3.5.2-2ubuntu0~16.04.13+esm14
- 3.5.2-2ubuntu0~16.04.13+esm15
- 3.5.2-2ubuntu0~16.04.13+esm16
- 3.5.2-2ubuntu0~16.04.13+esm17
- 3.5.2-2ubuntu0~16.04.13+esm18
- 3.5.2-2ubuntu0~16.04.13+esm19
- 3.5.2-2ubuntu0~16.04.13+esm20
- 3.5.2-2ubuntu0~16.04.13+esm21
- 3.5.2-2ubuntu0~16.04.13+esm22
- 3.5.2-2ubuntu0~16.04.13+esm23
- 3.5.2-2ubuntu0~16.04.13+esm24
- 3.5.2-2ubuntu0~16.04.13+esm25
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python3.6 Ubuntu:Pro:18.04:LTS
- Versions
- 3.6.3-1ubuntu1
- 3.6.4~rc1-1
- 3.6.4~rc1-2
- 3.6.4-1
- 3.6.4-2
- 3.6.4-3build1
- 3.6.4-4
- 3.6.5~rc1-1
- 3.6.5-3
- 3.6.6-1~18.04
- 3.6.7-1~18.04
- 3.6.8-1~18.04.1
- 3.6.8-1~18.04.2
- 3.6.8-1~18.04.3
- 3.6.9-1~18.04
- 3.6.9-1~18.04ubuntu1
- 3.6.9-1~18.04ubuntu1.1
- 3.6.9-1~18.04ubuntu1.3
- 3.6.9-1~18.04ubuntu1.4
- 3.6.9-1~18.04ubuntu1.6
- 3.6.9-1~18.04ubuntu1.7
- 3.6.9-1~18.04ubuntu1.8
- 3.6.9-1~18.04ubuntu1.9
- 3.6.9-1~18.04ubuntu1.10
- 3.6.9-1~18.04ubuntu1.12
- 3.6.9-1~18.04ubuntu1.13
- 3.6.9-1~18.04ubuntu1.13+esm1
- 3.6.9-1~18.04ubuntu1.13+esm2
- 3.6.9-1~18.04ubuntu1.13+esm3
- 3.6.9-1~18.04ubuntu1.13+esm4
- Affected ranges
- ECOSYSTEM: < 3.6.9-1~18.04ubuntu1.13+esm5
Update to 3.6.9-1~18.04ubuntu1.13+esm5
python3.7 Ubuntu:Pro:18.04:LTS
- Versions
- 3.7.0~a2-1
- 3.7.0~a3-1
- 3.7.0~a3-2
- 3.7.0~a3-3
- 3.7.0~a4-1
- 3.7.0~b1-1
- 3.7.0~b1-1build1
- 3.7.0~b2-1
- 3.7.0~b3-1
- 3.7.0-1~18.04
- 3.7.1-1~18.04
- 3.7.3-2~18.04.1
- 3.7.5-2~18.04
- 3.7.5-2~18.04.4
- 3.7.5-2ubuntu1~18.04.2
- 3.7.5-2ubuntu1~18.04.2+esm1
- 3.7.5-2ubuntu1~18.04.2+esm2
- 3.7.5-2ubuntu1~18.04.2+esm3
- 3.7.5-2ubuntu1~18.04.2+esm4
- 3.7.5-2ubuntu1~18.04.2+esm5
- Affected ranges
- ECOSYSTEM: < 3.7.5-2ubuntu1~18.04.2+esm6
Update to 3.7.5-2ubuntu1~18.04.2+esm6
python3.8 Ubuntu:Pro:18.04:LTS
- Versions
- 3.8.0-3~18.04
- 3.8.0-3~18.04.1
- 3.8.0-3ubuntu1~18.04.2
- 3.8.0-3ubuntu1~18.04.2+esm1
- 3.8.0-3ubuntu1~18.04.2+esm2
- 3.8.0-3ubuntu1~18.04.2+esm3
- 3.8.0-3ubuntu1~18.04.2+esm4
- Affected ranges
- ECOSYSTEM: < 3.8.0-3ubuntu1~18.04.2+esm5
Update to 3.8.0-3ubuntu1~18.04.2+esm5
python3.8 Ubuntu:Pro:20.04:LTS
- Versions
- 3.8.0-1
- 3.8.0-2
- 3.8.0-3
- 3.8.0-4
- 3.8.0-5
- 3.8.1-2ubuntu3
- 3.8.2~rc1-1ubuntu1
- 3.8.2-1
- 3.8.2-1ubuntu1
- 3.8.2-1ubuntu1.1
- 3.8.2-1ubuntu1.2
- 3.8.5-1~20.04
- 3.8.5-1~20.04.2
- 3.8.5-1~20.04.3
- 3.8.10-0ubuntu1~20.04
- 3.8.10-0ubuntu1~20.04.1
- 3.8.10-0ubuntu1~20.04.2
- 3.8.10-0ubuntu1~20.04.4
- 3.8.10-0ubuntu1~20.04.5
- 3.8.10-0ubuntu1~20.04.6
- 3.8.10-0ubuntu1~20.04.7
- 3.8.10-0ubuntu1~20.04.8
- 3.8.10-0ubuntu1~20.04.9
- 3.8.10-0ubuntu1~20.04.10
- 3.8.10-0ubuntu1~20.04.11
- 3.8.10-0ubuntu1~20.04.12
- 3.8.10-0ubuntu1~20.04.13
- 3.8.10-0ubuntu1~20.04.14
- 3.8.10-0ubuntu1~20.04.15
- 3.8.10-0ubuntu1~20.04.16
- 3.8.10-0ubuntu1~20.04.17
- 3.8.10-0ubuntu1~20.04.18
- Affected ranges
- ECOSYSTEM: < 3.8.10-0ubuntu1~20.04.18+esm1
Update to 3.8.10-0ubuntu1~20.04.18+esm1
python3.9 Ubuntu:Pro:20.04:LTS
- Versions
- 3.9.0~rc1-1~20.04
- 3.9.0-5~20.04
- 3.9.5-3~20.04.1
- 3.9.5-3ubuntu0~20.04.1
- 3.9.5-3ubuntu0~20.04.1+esm1
- 3.9.5-3ubuntu0~20.04.1+esm2
- 3.9.5-3ubuntu0~20.04.1+esm3
- 3.9.5-3ubuntu0~20.04.1+esm4
- Affected ranges
- ECOSYSTEM: < 3.9.5-3ubuntu0~20.04.1+esm5
Update to 3.9.5-3ubuntu0~20.04.1+esm5
python3.10 Ubuntu:22.04:LTS
- Versions
- 3.10.0-2
- 3.10.0-3
- 3.10.0-4
- 3.10.0-5
- 3.10.0-5build1
- 3.10.1-1
- 3.10.1-2
- 3.10.2-1
- 3.10.2-5
- 3.10.2-7
- 3.10.3-1
- 3.10.4-3
- 3.10.4-3ubuntu0.1
- 3.10.6-1~22.04
- 3.10.6-1~22.04.1
- 3.10.6-1~22.04.2
- 3.10.6-1~22.04.2ubuntu1
- 3.10.6-1~22.04.2ubuntu1.1
- 3.10.12-1~22.04.2
- 3.10.12-1~22.04.3
- 3.10.12-1~22.04.4
- 3.10.12-1~22.04.5
- 3.10.12-1~22.04.6
- 3.10.12-1~22.04.7
- 3.10.12-1~22.04.8
- 3.10.12-1~22.04.9
- Affected ranges
- ECOSYSTEM: < 3.10.12-1~22.04.10
Update to 3.10.12-1~22.04.10
python3.11 Ubuntu:Pro:22.04:LTS
- Versions
- 3.11.0~rc1-1~22.04
- 3.11.0~rc1-1~22.04.1~esm1
- 3.11.0~rc1-1~22.04.1~esm2
- 3.11.0~rc1-1~22.04.1~esm3
- Affected ranges
- ECOSYSTEM: < 3.11.0~rc1-1~22.04.1~esm4
Update to 3.11.0~rc1-1~22.04.1~esm4
python3.12 Ubuntu:24.04:LTS
- Versions
- 3.12.0-1
- 3.12.0-5
- 3.12.0-6
- 3.12.0-7
- 3.12.1-2
- 3.12.2-1
- 3.12.2-4build3
- 3.12.2-4build4
- 3.12.2-5ubuntu3
- 3.12.3-1
- 3.12.3-1ubuntu0.1
- 3.12.3-1ubuntu0.2
- 3.12.3-1ubuntu0.3
- 3.12.3-1ubuntu0.4
- 3.12.3-1ubuntu0.5
- Affected ranges
- ECOSYSTEM: < 3.12.3-1ubuntu0.6
Update to 3.12.3-1ubuntu0.6
Original sources
- https://github.com/python/cpython/issues/100884
- https://github.com/python/cpython/pull/100885
- https://github.com/python/cpython/pull/119099
- https://github.com/python/cpython/commit/09fab93c3d857496c0bd162797fab816c311ee48
- https://github.com/python/cpython/commit/70754d21c288535e86070ca7a6e90dcb670b8593
- https://github.com/python/cpython/commit/9148b77e0af91cdacaa7fe3dfac09635c3fe9a74
- https://mail.python.org/archives/list/[email protected]/thread/MB62IZMEC3UM6SGHP5LET5JX2Y7H4ZUR/
- https://github.com/python/cpython/commit/a4ef689ce670684ec132204b1cd03720c8e0a03d
- https://github.com/python/cpython/commit/d4df3c55e4c5513947f907f24766b34d2ae8c090
- https://lists.debian.org/debian-lts-announce/2025/03/msg00013.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-1795