CVE-2026-1502

MEDIUM

HTTP client proxy tunnel headers not validated for CR/LF

Title source: cna
STIX 2.1

Description

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

References (8)

Core 8
Core References
Issue Tracking issue-tracking
https://github.com/python/cpython/issues/146211

Scores

CVSS v4 5.7
EPSS 0.0047
EPSS Percentile 37.1%
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-93
Status published
Products (6)
Python Software Foundation/CPython < 3.13.14
Python Software Foundation/CPython < 3.14.5rc1
Python Software Foundation/CPython < 3.15.0
Python Software Foundation/CPython 3.14.0a1 - 3.14.5rc1
Python Software Foundation/CPython 3.15.0a1 - 3.15.0
Python Software Foundation/CPython 3.15.0a1 - 3.15.0b1
Published Apr 10, 2026
Tracked Since Apr 11, 2026