CVE-2026-34525 — AIOHTTP: Duplicate Host header accepted
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 patch…
Published: 2026-04-01 · CVSS: 6.3 · CVSS 4.0
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 Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7