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Multipart Header Size Bypass

Low
Dreamsorcerer published GHSA-m5qp-6w8w-w647 Mar 31, 2026

Package

pip aiohttp (pip)

Affected versions

<=3.13.3

Patched versions

3.13.4

Description

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: 8a74257

Severity

Low

CVE ID

CVE-2026-34516

Weaknesses

No CWEs

Credits