https://seclists.org/oss-sec/2026/q2/98: CPython [CVE-2026-1502] HTTP client proxy tunnel headers not validated for CR/LF
Published Apr 11, 2026
·Updated
Affected Software
1 affected component
Python CPython
Frequently Asked Questions
1
What is the severity of CVE-2026-1502?
CVE-2026-1502 has been classified as a MEDIUM severity vulnerability.
2
How do I fix CVE-2026-1502?
To fix CVE-2026-1502, update to the latest version of CPython where the vulnerability has been addressed.
3
What does CVE-2026-1502 involve?
CVE-2026-1502 involves the HTTP client proxy not validating CR/LF bytes in tunnel headers.
4
Who is affected by CVE-2026-1502?
Users of CPython's HTTP client, particularly those using proxy tunneling, are affected by CVE-2026-1502.
5
When was CVE-2026-1502 published?
CVE-2026-1502 was published on April 11, 2026.