CVE-2026-1502
Medium
Description
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
SeverityMedium
CVSS5.7
Exploit probability—
ProductCPython
PublishedApr 10, 2026
First seenApr 10, 2026
Weakness typeCWE-93CWE-93
How to fix
Update
- Python Software Foundation CPython3.10.21, 3.11.16, 3.12.14, 3.13.14, 3.14.5rc1, 3.15.0b1 or later
Patches
- github.com/python/cpython/pull/146212
- github.com/python/cpython/commit/05ed7ce7ae9e17c23a04085b2539fe6d6d3cef69
- github.com/python/cpython/commit/b1cf9016335cb637c5a425032e8274a224f4b2ed
- github.com/python/cpython/commit/9e071c9b28c17f347f81b388a003d4eeb3c7a8dd
- github.com/python/cpython/commit/c00c386faa579ad71196d33408644478488e43ec
- github.com/python/cpython/commit/56b7100b04e44ea27989242b176beb8f016b2c53
- github.com/python/cpython/commit/58703ec1bdd1eb075e8b01a0c427683ce594dd3e
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Python Software Foundation CPython | v < 3.10.21, 3.11.0 ≤ v < 3.11.16, 3.12.0 ≤ v < 3.12.14, 3.13.0 ≤ v < 3.13.14, 3.14.0a1 ≤ v < 3.14.5rc1, 3.15.0a1 ≤ v < 3.15.0b1 | 3.10.21, 3.11.16, 3.12.14, 3.13.14, 3.14.5rc1, 3.15.0b1 |
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