PT-2026-49588 · Pypi · Aiohttp

Published 2026-06-15 · Updated 2026-06-15 · CVE-2026-54274

OSV

CVSS v4.0

6.6

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

Summary

If an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use.

Impact

If a web application has WebSocket endpoints, it may be possible for an attacker to execute a DoS attack through excessive memory use.

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Patch: https://github.com/aio-libs/aiohttp/commit/14b6ee851fb16ec199acb950de0c82d476799e7d

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-54274

GHSA-XCGM-R5H9-7989

Affected Products

Aiohttp

References · 3

• https://osv.dev/vulnerability/GHSA-xcgm-r5h9-7989 · Vendor Advisory
• https://github.com/aio-libs/aiohttp/security/advisories/GHSA-xcgm-r5h9-7989 · Note
• https://github.com/aio-libs/aiohttp · Note