VDB
CVE-2026-53525
CVE-2026-53525
PUBLISHED
CVSS 7.4 HIGH
Reported by GitHub_M · Published August 21, 2026
WeeChat (Wee Enhanced Environment for Chat) is a free chat client. In versions 0.3.1 through 4.9.0, the WeeChat relay authentication uses non-constant-time string comparison functions (weechat_strcasecmp and strcmp) to verify password hashes and plaintext passwords. An attacker can exploit timing differences to extract the server-computed hash character by character, then authenticate using the correct hash without knowing the password. Version 4.9.1 fixes the issue.
Risk Scores
CVSS 3.1
7.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| weechat | weechat | >= 0.3.4, < 4.9.1 |
| weechat | weechat | >= 0.3.4, < 4.9.1 |
Timeline
- Aug 9, 2026 CVE Published
References
- https://github.com/weechat/weechat/security/advisories/GHSA-vhv8-g2r9-cwcc x_refsource_CONFIRM