Medium severity · published Sep 25, 2026
CVE-2026-84461
Zammad: Missing rate limiting allows password brute-forcing during two-factor login
6.9
CVSS
0.3%
EPSS
No
On KEV
Description
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZA
zammad · zammad
< 7.1.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84461
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84461
github.com
https://github.com/zammad/zammad/commit/d51254f1c6da13f6ee27636a5c82e53f7e59666b
github.com
https://github.com/zammad/zammad/security/advisories/GHSA-6vh5-pfp2-5rmh
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