CVE-2026-84461Zammad: Missing rate limiting allows password brute-forcing during two-factor login

Descripción

Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, the two-factor login step let an attacker try unlimited password guesses for any account without triggering Zammad's normal lockout or rate limiting. The response also revealed whether a guess was correct, even before two-factor authentication was checked. This made it possible to brute-force weak or reused passwords. This issue is fixed in version 7.1.2.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://github.com/zammad/zammad/security/advisories/GHSA-6vh5-pfp2-5rmh
• https://github.com/zammad/zammad/commit/d51254f1c6da13f6ee27636a5c82e53f7e59666b