CVE-2026-34518
AIOHTTP: Cookie and Proxy-Authorization headers leaked on cross-origin redirect
Summary
AIOHTTP: Cookie and Proxy-Authorization headers leaked on cross-origin redirect
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-34518 python-aiohttp Fixed in: 3.7.4-1+deb11u2
- Ubuntu UBUNTU-CVE-2026-34518 python-aiohttp
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com
- web github.com