{"id":"CVE-2026-84461","state":"PUBLISHED","title":"Zammad: Missing rate limiting allows password brute-forcing during two-factor login","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.","publishedAt":"2026-09-25T18:21:20.015Z","updatedAt":"2026-09-25T18:41:14.822Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["zammad zammad"],"affected":[{"vendor":"zammad","product":"zammad","versions":[{"version":"< 7.1.2","status":"affected"}]}],"references":["https://github.com/zammad/zammad/security/advisories/GHSA-6vh5-pfp2-5rmh","https://github.com/zammad/zammad/commit/d51254f1c6da13f6ee27636a5c82e53f7e59666b"],"weaknesses":["CWE-203","CWE-307","CWE-799"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/84xxx/CVE-2026-84461.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-84461","state":"PUBLISHED","datePublished":"2026-09-25T18:21:20.015Z","dateUpdated":"2026-09-25T18:41:14.822Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-01T20:05:09.424Z"},"containers":{"cna":{"title":"Zammad: Missing rate limiting allows password brute-forcing during two-factor login","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"zammad","product":"zammad","versions":[{"version":"< 7.1.2","status":"affected"}]}],"references":[{"url":"https://github.com/zammad/zammad/security/advisories/GHSA-6vh5-pfp2-5rmh","name":"https://github.com/zammad/zammad/security/advisories/GHSA-6vh5-pfp2-5rmh","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/zammad/zammad/commit/d51254f1c6da13f6ee27636a5c82e53f7e59666b","name":"https://github.com/zammad/zammad/commit/d51254f1c6da13f6ee27636a5c82e53f7e59666b","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-203","lang":"en","description":"CWE-203: Observable Discrepancy","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-307","lang":"en","description":"CWE-307: Improper Restriction of Excessive Authentication Attempts","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-799","lang":"en","description":"CWE-799: Improper Control of Interaction Frequency","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-25T18:21:20.015Z"},"source":{"advisory":"GHSA-6vh5-pfp2-5rmh","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-25T18:41:07.364423Z","id":"CVE-2026-84461","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-25T18:41:14.822Z"}}]}}}