| Name | CVE-2026-34525 |
| Description | AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, multiple Host headers were allowed in aiohttp. This issue has been patched in version 3.13.4. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1132582 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| python-aiohttp (PTS) | bullseye | 3.7.4-1 | vulnerable |
| bullseye (security) | 3.7.4-1+deb11u1 | vulnerable | |
| bookworm, bookworm (security) | 3.8.4-1+deb12u1 | vulnerable | |
| trixie | 3.11.16-1 | vulnerable | |
| forky, sid | 3.13.3-3 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| python-aiohttp | source | (unstable) | (unfixed) | 1132582 |
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-c427-h43c-vf67
Fixed by; https://github.com/aio-libs/aiohttp/commit/e00ca3cca92c465c7913c4beb763a72da9ed8349 (v3.13.4)
Fixed by: https://github.com/aio-libs/aiohttp/commit/53e2e6fc58b89c6185be7820bd2c9f40216b3000 (v3.13.5)