Vulnerability in Python Software Foundation Cpython
CVE-2026-1502
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
Vulnerability class: CRLF Injection
Published · last modified .
EPSS exploit prediction
EPSS: 0.006 (44.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Python Software Foundation Cpython — versions 0, 3.13.0, 3.11.0
Weakness classification (CWE)
References
- github.com/python/cpython/pull/146212 (patch)
- github.com/python/cpython/issues/146211 (issue-tracking)
- mail.python.org/archives/list/security-announce@python.org/thread/2IVPAEQWUJBCT… (vendor-advisory)
- github.com/python/cpython/commit/05ed7ce7ae9e17c23a04085b2539fe6d6d3cef69 (patch)
- github.com/python/cpython/commit/b1cf9016335cb637c5a425032e8274a224f4b2ed (patch)
- af854a3a-2127-422b-91ae-364da2661108
- github.com/python/cpython/commit/9e071c9b28c17f347f81b388a003d4eeb3c7a8dd (patch)
- github.com/python/cpython/commit/c00c386faa579ad71196d33408644478488e43ec (patch)
- github.com/python/cpython/commit/56b7100b04e44ea27989242b176beb8f016b2c53 (patch)
- github.com/python/cpython/commit/58703ec1bdd1eb075e8b01a0c427683ce594dd3e (patch)