PT-2026-29605 · Aiohttp · Aiohttp

Bekkaze · Published 2026-04-01 · Updated 2026-05-18 · CVE-2026-34516

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions AIOHTTP versions prior to 3.13.4

Description A response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially leading to a denial-of-service condition. Multipart headers were not subject to the same size restrictions as normal headers, potentially allowing a larger amount of data to be loaded into memory than expected.

Recommendations Update to version 3.13.4 or later.

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CLEANSTART-2026-AN27706

CVE-2026-34516

ECHO-AC58-CDA1-4C8B

GHSA-M5QP-6W8W-W647

OESA-2026-2192

OESA-2026-2193

OESA-2026-2194

OPENSUSE-SU-2026:10545-1

Affected Products

Aiohttp

References · 65

• https://github.com/aio-libs/aiohttp/commit/8a74257b3804c9aac0bf644af93070f68f6c5a6f · Patch
• https://github.com/aio-libs/aiohttp/security/advisories/GHSA-m5qp-6w8w-w647 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-34516 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34514 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2194 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-30922 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-34513 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-34073 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-44432 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-34516 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-34052 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-34520 · Security Note
• https://osv.dev/vulnerability/CLEANSTART-2026-AN27706 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-22815 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31958 · Security Note