~ / search / GHSA-m5qp-6w8w-w647

GHSA-m5qp-6w8w-w647

AIOHTTP has a Multipart Header Size Bypass

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-34516

Packages

EcosystemPackageAffectedFixed in
PyPI aiohttp < 3.13.4 3.13.4

Details

As written in the advisory (Markdown source, shown as plain text).

### Summary A response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability. ### Impact Multipart headers were not subject to the same size restrictions in place for normal headers, potentially allowing substantially more data to be loaded into memory than intended. However, other restrictions in place limit the impact of this vulnerability. ----- Patch: https://github.com/aio-libs/aiohttp/commit/8a74257b3804c9aac0bf644af93070f68f6c5a6f

References

External links from the advisory. They lead to third-party sites.