CVE-2026-34517

5.3 MEDIUM
Published: April 01, 2026 Modified: April 15, 2026
View on NVD

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, for some multipart form fields, aiohttp read the entire field into memory before checking client_max_size. This issue has been patched in version 3.13.4.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/aio-libs/aiohttp/commit/cbb774f38330563422ca0c413a71021d7b944145
Source: security-advisories@github.com
Patch
https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4
Source: security-advisories@github.com
Release Notes
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-3wq7-rqq7-wx6j
Source: security-advisories@github.com
Patch Vendor Advisory

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
0.1%
16th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-770

Affected Vendors

aiohttp

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