CVEvulnerability

CVE-2026-53525

7.4 HIGH Published 2026-08-21 Modified 2026-10-14 Official page ↗
Status
Deferred
Published
2026-08-21
Last modified
2026-10-14
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Weaknesses
CWE-208

Description

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.

Related

Weakness · CWE (1)

  • CWE-208 Observable Timing Discrepancy weakness

References