← CVE Intelligence

CVE-2026-34525

AIOHTTP: Duplicate Host header accepted PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
aio-libs / aiohttpaffected < 3.13.4

CWE

CWE-20, CWE-444

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.