CVE-2026-1299

Medium CVSS: 6.0

The
email module, specifically the "BytesGenerator" class, didn’t properly quote newlines for email headers when
serializing an email message allowing for header injection when an email
is serialized. This is only applicable if using "LiteralHeader" writing headers that don't respect email folding rules, the new behavior will reject the incorrectly folded headers in "BytesGenerator".

Vendor

Product

CWE

CWE-93

Yayın Tarihi

2026-01-23 17:16:12

Güncelleme

2026-02-13 17:16:12

Source Identifier

cna@python.org

KEV Date Added

Kategoriler

CWE-93 MEDIUM 2026

Referanslar

https://cve.org/CVERecord?id=CVE-2024-6923 https://github.com/python/cpython/commit/052e55e7d44718fe46cbba0ca995cb8fcc359413 https://github.com/python/cpython/commit/0a925ab591c45d6638f37b5e57796f36fa0e56d8 https://github.com/python/cpython/commit/7877fe424415bc4a13045e62a90a7277413d8cb9 https://github.com/python/cpython/commit/842ce19a0c0b58d61591e8f6a708c38db1fb94e4 https://github.com/python/cpython/commit/8cdf6204f4ae821f32993f8fc6bad0d318f95f36 https://github.com/python/cpython/commit/e417f05ad77a4c30ddc07f99e90fc0cef43e831a https://github.com/python/cpython/issues/144125 https://github.com/python/cpython/pull/144126 https://mail.python.org/archives/list/security-announce@python.org/thread/6ZZULGALJTITEAGEXLDJE2C6FORDXPBT/