CVE-2026-1502
HTTP client proxy tunnel headers not validated for CR/LF
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
7th
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
| Vendor | python software foundation |
| Product | cpython |
| Published | Apr 10, 2026 |
| Last Updated | Jun 4, 2026 |
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Affected Versions
Python Software Foundation / CPython
0 < 3.14.5rc1 3.15.0a1 < 3.15.0b1
References
github.com: https://github.com/python/cpython/pull/146212 github.com: https://github.com/python/cpython/issues/146211 mail.python.org: https://mail.python.org/archives/list/[email protected]/thread/2IVPAEQWUJBCTQZEJEVTYCIKSMQPGRZ3/ github.com: https://github.com/python/cpython/commit/05ed7ce7ae9e17c23a04085b2539fe6d6d3cef69 github.com: https://github.com/python/cpython/commit/b1cf9016335cb637c5a425032e8274a224f4b2ed github.com: https://github.com/python/cpython/commit/9e071c9b28c17f347f81b388a003d4eeb3c7a8dd github.com: https://github.com/python/cpython/commit/c00c386faa579ad71196d33408644478488e43ec openwall.com: http://www.openwall.com/lists/oss-security/2026/04/11/4
Credits
🔍 senseicat Seth Larson