CVE-2026-53525 | BDVDB-2026-363383 Detail

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.

Impact#

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Exploit#

History#

1. Version 12026-08-21Record published in the CVE List.
2. Version 22026-08-25Most recent update recorded in the CVE List.