Out-of-bounds Read Affecting weechat package, versions <2.8-1ubuntu0.1~esm1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
1.59% (73rd percentile)

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  • Snyk IDSNYK-UBUNTU2004-WEECHAT-1583748
  • published22 Mar 2026
  • disclosed5 Sept 2021

Introduced: 5 Sep 2021

CVE-2021-40516  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 weechat to version 2.8-1ubuntu0.1~esm1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream weechat package and not the weechat package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

WeeChat before 3.2.1 allows remote attackers to cause a denial of service (crash) via a crafted WebSocket frame that trigger an out-of-bounds read in plugins/relay/relay-websocket.c in the Relay plugin.

CVSS Base Scores

version 3.1