CVE-2026-34518 | THREATINT

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, when following redirects to a different origin, aiohttp drops the Authorization header, but retains the Cookie and Proxy-Authorization headers. This issue has been patched in version 3.13.4.

PUBLISHED Reserved 2026-03-30 | Published 2026-04-01 | Updated 2026-04-02 | Assigner GitHub_M

LOW: 2.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

Problem types

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Product status

< 3.13.4

affected

References

github.com/...iohttp/security/advisories/GHSA-966j-vmvw-g2g9

github.com/...ommit/5351c980dcec7ad385730efdf4e1f4338b24fdb6

github.com/aio-libs/aiohttp/releases/tag/v3.13.4

cve.org (CVE-2026-34518)

nvd.nist.gov (CVE-2026-34518)

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