CVE-2026-76816

3.5 Faible

Publiée le 24/08/2026 à 22:17 · Modifiée le 12/10/2026 à 23:10 · Analyse NVD reportée · Source : security-advisories@github.com

Description

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.137.Final and 4.2.17.Final, MqttEncoder does not validate client identifiers, will topics, usernames, and PUBLISH topic names before encoding, allowing prohibited null bytes in MQTT UTF-8 string fields and potentially causing routing, access-control, or identity mismatches in downstream brokers. The vulnerability is exploitable when an application uses Netty's MQTT encoder to construct messages from user-controlled input. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final.

Traduire en français

Produits concernés

netty

Scores CVSS

Version	Score	Source	Vecteur
3.1	3.5 Faible	security-advisories@github.com	`CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N`

Faiblesses (CWE)

CWE-20
CWE-626

Références

https://github.com/netty/netty/commit/1b5abc6443b63726c72cdd285af2feb7ddbb8ff7
https://github.com/netty/netty/commit/9e0519239108a69b7e9bbc5e9182ee139a0d7961
https://github.com/netty/netty/security/advisories/GHSA-43fm-7cxg-hf3j

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories