PT-2026-49591 · Pypi · Aiohttp

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CVE-2026-54277

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Published

2026-06-15

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Updated

2026-07-23

CVSS v3.1

7.5

High

VectorAV: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 3.14.1
Description An issue exists in the C parser of the asynchronous HTTP client/server framework where the max line size check can be bypassed in parts of an HTTP request. When using the optimized C parser, which is the default in pre-built wheels, an attacker can send oversized lines through the HTTP parser to consume an excessive amount of memory, potentially resulting in a Denial of Service (DoS), a condition where a system becomes unavailable to its intended users.
Recommendations Update to version 3.14.1.

Exploit

Fix

DoS

Allocation of Resources Without Limits

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Weakness Enumeration

Related Identifiers

CVE-2026-54277
ECHO-C85B-77DD-0D28
GHSA-63HW-FMQ6-XXG2
OESA-2026-2838
OESA-2026-2839
OPENSUSE-SU-2026:11097-1
OPENSUSE-SU-2026:21372-1
PYSEC-2026-2110
SUSE-SU-2026:22819-1
SUSE-SU-2026:3207-1
SUSE-SU-2026:3208-1

Affected Products

Aiohttp