Uncontrolled Memory Allocation in WeeChat - #VU147390
Published: September 8, 2026
Vulnerability identifier: #VU147390
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-789
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled memory allocation in the Relay plugin when receiving unterminated text messages from a client. A remote attacker can send a large amount of text data without an end-of-text marker to cause a denial of service.
Affected software
WeeChat
Remediation
Install security update from vendor's website.
WeeChat - update to 4.10.1