PT-2026-29602 · Aiohttp+3 · Aiohttp+3

·

CVE-2026-34513

·

Published

2026-02-22

·

Updated

2026-08-21

CVSS v2.0

7.8

High

VectorAV:N/AC:L/Au:N/C:N/I:N/A:C
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.

Exploit

Fix

DoS

Allocation of Resources Without Limits

Found an issue in the description? Have something to add? Feel free to write us 👾

Weakness Enumeration

Related Identifiers

AZL-81758
BDU:2026-09559
CLEANSTART-2026-AN24336
CLEANSTART-2026-AN27706
CLEANSTART-2026-AZ09261
CLEANSTART-2026-CQ05396
CLEANSTART-2026-EM82280
CLEANSTART-2026-FU07345
CLEANSTART-2026-HP19968
CLEANSTART-2026-IR98353
CLEANSTART-2026-KE11953
CLEANSTART-2026-MR94452
CLEANSTART-2026-NL78203
CLEANSTART-2026-NM83456
CLEANSTART-2026-QE89118
CLEANSTART-2026-SO50412
CLEANSTART-2026-WQ85001
CLEANSTART-2026-WU03167
CVE-2026-34513
ECHO-BC93-24A8-8727
GHSA-HCC4-C3V8-RX92
OESA-2026-2192
OESA-2026-2193
OESA-2026-2194
OPENSUSE-SU-2026:21098-1
PYSEC-2026-2095
SUSE-SU-2026:22173-1
SUSE-SU-2026:3059-1
SUSE-SU-2026:3207-1
USN-8591-1

Affected Products

Aiohttp
Linuxmint
Red Os
Ubuntu