high7.4
CVE-2026-53525
WeeChat (Wee Enhanced Environment for Chat) is a free chat client.
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| Versions 0.3.1 | through 4.9.0 |
Versions were read from the advisory text. No structured product data has been published for this record yet.