CVE-2026-34525AIOHTTP: Duplicate Host header accepted

Descripción

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.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://github.com/aio-libs/aiohttp/security/advisories/GHSA-c427-h43c-vf67 PatchVendor Advisory
• https://github.com/aio-libs/aiohttp/commit/53e2e6fc58b89c6185be7820bd2c9f40216b3000 Patch
• https://github.com/aio-libs/aiohttp/commit/e00ca3cca92c465c7913c4beb763a72da9ed8349 Patch
• https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4 Release Notes