CVE-2026-34516

HIGH

7.5

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, a response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability. This issue has been patched in version 3.13.4.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/1/2026

Last Modified4/4/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-770

References

https://github.com/aio-libs/aiohttp/commit/8a74257b3804c9aac0bf644af93070f68f6c5a6f(security-advisories@github.com)

https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4(security-advisories@github.com)

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-m5qp-6w8w-w647(security-advisories@github.com)

IOC Correlations

No correlations recorded

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