CVE-2025-1795

LOW

Exchange - Info Disclosure

Title source: llm

Description

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.

References (10)

[Mailing List] https://lists.debian.org/debian-lts-announce/2025/03/msg00013.html

[Issue Tracking] https://github.com/python/cpython/issues/100884

[Issue Tracking] https://github.com/python/cpython/pull/100885

[Issue Tracking] https://github.com/python/cpython/pull/119099

[Patch] https://github.com/python/cpython/commit/09fab93c3d857496c0bd162797fab816c311ee48

[Patch] https://github.com/python/cpython/commit/70754d21c288535e86070ca7a6e90dcb670b8593

View Patch ZIP pw:eip

[Patch] https://github.com/python/cpython/commit/9148b77e0af91cdacaa7fe3dfac09635c3fe9a74

[Various Sources] https://mail.python.org/archives/list/[email protected]/thread/MB62IZMEC3UM6SGHP5LET5JX2Y7H4ZUR/

[Patch] https://github.com/python/cpython/commit/a4ef689ce670684ec132204b1cd03720c8e0a03d

[Patch] https://github.com/python/cpython/commit/d4df3c55e4c5513947f907f24766b34d2ae8c090

Scores

CVSS v4 2.3

EPSS 0.0075

EPSS Percentile 73.3%

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-116

Status published

Products (6)

Python Software Foundation/CPython < 3.10.17

Python Software Foundation/CPython < 3.9.23

Python Software Foundation/CPython 3.10.0 - 3.10.17

Python Software Foundation/CPython 3.11.0 - 3.11.9

Python Software Foundation/CPython 3.12.0 - 3.12.3

Python Software Foundation/CPython 3.13.0a1 - 3.13.0a5

Published Feb 28, 2025

Tracked Since Feb 18, 2026