CVE-2026-1502

medium

Description

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.

References

https://mail.python.org/archives/list/[email protected]/thread/2IVPAEQWUJBCTQZEJEVTYCIKSMQPGRZ3/

https://github.com/python/cpython/pull/146212

https://github.com/python/cpython/issues/146211

https://github.com/python/cpython/commit/c00c386faa579ad71196d33408644478488e43ec

https://github.com/python/cpython/commit/b1cf9016335cb637c5a425032e8274a224f4b2ed

https://github.com/python/cpython/commit/9e071c9b28c17f347f81b388a003d4eeb3c7a8dd

https://github.com/python/cpython/commit/05ed7ce7ae9e17c23a04085b2539fe6d6d3cef69

http://www.openwall.com/lists/oss-security/2026/04/11/4

Details

Source: Mitre, NVD

Published: 2026-04-10

Updated: 2026-06-04

Risk Information

CVSS v2

Base Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:M/C:N/I:C/A:N

Severity: Medium

CVSS v3

Base Score: 4.5

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N

Severity: Medium

CVSS v4

Base Score: 5.7

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00042