CVE-2026-59881

AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate

MEDIUM 6.9

En bref

Source: NVD
EPSS: EPSS 0.52 % · centile 44 (2026-10-28)
État: PUBLISHED
Publiée: 2026-07-30 17:34 UTC
Mise à jour: 2026-07-30 18:35 UTC
Attribuée par: GitHub_M
Statut NVD: Deferred

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the WebSocket client accepts and decompresses frames with the RSV1 bit set even when the permessage-deflate extension was not negotiated, allowing a malicious server to cause unexpected CPU and memory consumption. This issue is fixed in version 3.14.2.

Faiblesses (CWE)

CWE-20 — Validation d'entrée incorrecte

Références

Scores

Version	Score	Vecteur	Évalué par
CVSS 4.0	MEDIUM 6.9	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	GitHub_M
CVSS 4.0	MEDIUM 6.9	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD · security-advisories@github.com (Secondary)

Avis

GHSA-mq44-7p77-q5h7 — AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate
PYSEC-2026-3547 — AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate

Références européennes

ENISA EUVD · EUVD-2026-51257
GCVE · GCVE-0-2026-59881

Avis du CERT-FR

CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr

Produits affectés

Produit	Versions
aio-libs · aiohttp	affected < 3.14.2

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD