CVE-2026-1502 MEDIUM

CVE-2026-1502: HTTP client proxy tunnel headers not validated for CR/LF

Vendor Python Software Foundation
Product CPython
Published April 10, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

5.7/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction —
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

April 10, 2026 CVE published
June 30, 2026 Record updated