{"id":"CVE-2026-34721","state":"PUBLISHED","title":"Zammad has Cross-site request forgery (CSRF) in OAuth callback endpoints","description":"Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the OAuth callback endpoints for Microsoft, Google, and Facebook external credentials do not validate a CSRF state parameter. This vulnerability is fixed in 7.0.1 and 6.5.4.","publishedAt":"2026-04-08T18:12:32.504Z","updatedAt":"2026-04-09T14:22:33.535Z","severity":{"score":5.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["zammad zammad"],"affected":[{"vendor":"zammad","product":"zammad","versions":[{"version":"< 6.5.4","status":"affected"},{"version":">= 7.0.0-alpha, < 7.0.1","status":"affected"}]}],"references":["https://github.com/zammad/zammad/security/advisories/GHSA-mfwp-hx66-626c"],"weaknesses":["CWE-352"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/34xxx/CVE-2026-34721.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34721","state":"PUBLISHED","datePublished":"2026-04-08T18:12:32.504Z","dateUpdated":"2026-04-09T14:22:33.535Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-30T18:41:20.753Z"},"containers":{"cna":{"title":"Zammad has Cross-site request forgery (CSRF) in OAuth callback endpoints","descriptions":[{"lang":"en","value":"Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the OAuth callback endpoints for Microsoft, Google, and Facebook external credentials do not validate a CSRF state parameter. This vulnerability is fixed in 7.0.1 and 6.5.4."}],"affected":[{"vendor":"zammad","product":"zammad","versions":[{"version":"< 6.5.4","status":"affected"},{"version":">= 7.0.0-alpha, < 7.0.1","status":"affected"}]}],"references":[{"url":"https://github.com/zammad/zammad/security/advisories/GHSA-mfwp-hx66-626c","name":"https://github.com/zammad/zammad/security/advisories/GHSA-mfwp-hx66-626c","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"PASSIVE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-352","lang":"en","description":"CWE-352: Cross-Site Request Forgery (CSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-08T18:12:32.504Z"},"source":{"advisory":"GHSA-mfwp-hx66-626c","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-09T14:22:26.863931Z","id":"CVE-2026-34721","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-09T14:22:33.535Z"}}]}}}