Use-after-free in WeeChat - #VU139829
Published: July 28, 2026
Vulnerability identifier: #VU139829
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: N/A
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Affected software:
WeeChat
WeeChat
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in the irc plugin when a batched message disconnects the server. A remote attacker can perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.