PT-2026-29602 · Aiohttp · Aiohttp

Gonas0919 · Published 2026-04-01 · Updated 2026-05-18 · CVE-2026-34513

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 AIOHTTP, an asynchronous HTTP client/server framework, is susceptible to excessive memory usage due to an unbounded DNS cache. This can potentially lead to a Denial of Service (DoS) situation if an application makes requests to a large number of hosts, causing the DNS cache to grow continuously.

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-2026-34513

ECHO-BC93-24A8-8727

GHSA-HCC4-C3V8-RX92

OESA-2026-2192

OESA-2026-2193

OESA-2026-2194

Affected Products

Aiohttp

References · 63

• https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hcc4-c3v8-rx92 · Vendor Advisory
• https://github.com/aio-libs/aiohttp/commit/c4d77c3533122be353b8afca8e8675e3b4cbda98 · Patch
• 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://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://security-tracker.debian.org/tracker/CVE-2026-34513 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31958 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2192 · Vendor Advisory