CVE-2025-11468

EUVD-2025-206306
When 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.
CRLF Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
UNKNOWN
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Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 13%
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://github.com/python/cpython/commit/003b8315669b9f08b1010a49071f73f15f818094
https://github.com/python/cpython/commit/17d1490aa97bd6b98a42b1a9b324ead84e7fd8a2
https://github.com/python/cpython/commit/61614a5e5056e4f61ced65008d4576f3df34acb6
https://github.com/python/cpython/commit/a76e4cd62dd68e7cbe86e37e6ed988495a646b66
https://github.com/python/cpython/commit/e9970f077240c7c670e8a6fc6662f2b30d3b6ad0
https://github.com/python/cpython/commit/f738386838021c762efea6c9802c82de65e87796
https://github.com/python/cpython/issues/143935
https://github.com/python/cpython/pull/143936
https://mail.python.org/archives/list/security-announce@python.org/thread/FELSEOLBI2QR6YLG6Q7VYF7FWSGQTKLI/