PYSEC-2026-2098

vendorUSosv

view advisory published 2026-04-01Licence: CC-BY-4.0

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-34516US	—	0.44% (38th)	—	2026-04-01
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…

references

External citations — patches, advisories, analysis.

https://github.com/aio-libs/aiohttp/commit/8a74257b3804c9aac0bf644af93070f68f6c5a6fFIX
https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4ADVISORY
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-m5qp-6w8w-w647FIX

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