CVE-2026-34525

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/aio-libs/aiohttp/commit/53e2e6fc58b89c6185be7820bd2c9f40216b3000
https://github.com/aio-libs/aiohttp/commit/e00ca3cca92c465c7913c4beb763a72da9ed8349
https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-c427-h43c-vf67

Configurations

No configuration.

History

01 Apr 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-01 21:17

Updated : 2026-04-03 16:10

NVD link : CVE-2026-34525

Mitre link : CVE-2026-34525

CVE.ORG link : CVE-2026-34525

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

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