{"id":"CVE-2026-93637","state":"PUBLISHED","title":"Zimbra Collaboration Suite GraphQL Batched Authentication Bypasses Pre-Auth Rate Limiting","description":"An authentication rate-limit bypass in Zimbra Collaboration Suite 10.1.0 through 10.1.21 allows unauthenticated attackers to make repeated password guesses through GraphQL without incrementing Zimbra’s source-IP failure counter. GraphQL aliases allow multiple authentication attempts in one HTTP request.","publishedAt":"2026-10-14T16:25:23.436Z","updatedAt":"2026-10-16T15:31:51.432Z","severity":{"score":3.7,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","source":"rapid7"},"assigner":"rapid7","products":["Zimbra Zimbra Collaboration Suite"],"affected":[{"vendor":"Zimbra","product":"Zimbra Collaboration Suite","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"10.1.21","versionType":"semver"}]}],"references":["https://www.rapid7.com/blog/post/ve-breaking-zimbra-identity-boundaries-part-1"],"weaknesses":["CWE-307"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/93xxx/CVE-2026-93637.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93637","state":"PUBLISHED","datePublished":"2026-10-14T16:25:23.436Z","dateUpdated":"2026-10-16T15:31:51.432Z","assignerShortName":"rapid7","assignerOrgId":"9974b330-7714-4307-a722-5648477acda7","dateReserved":"2026-09-18T12:22:38.558Z"},"containers":{"cna":{"title":"Zimbra Collaboration Suite GraphQL Batched Authentication Bypasses Pre-Auth Rate Limiting","descriptions":[{"lang":"en","value":"An authentication rate-limit bypass in Zimbra Collaboration Suite 10.1.0 through 10.1.21 allows unauthenticated attackers to make repeated password guesses through GraphQL without incrementing Zimbra’s source-IP failure counter. GraphQL aliases allow multiple authentication attempts in one HTTP request."}],"affected":[{"vendor":"Zimbra","product":"Zimbra Collaboration Suite","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"10.1.21","versionType":"semver"}]}],"references":[{"url":"https://www.rapid7.com/blog/post/ve-breaking-zimbra-identity-boundaries-part-1","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","baseSeverity":"LOW","baseScore":3.7,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-307","lang":"en","description":"CWE-307 Improper restriction of excessive authentication attempts","type":"CWE"}]}],"providerMetadata":{"shortName":"rapid7","orgId":"9974b330-7714-4307-a722-5648477acda7","dateUpdated":"2026-10-14T16:25:23.436Z"},"datePublic":"2026-10-14T16:19:00.000Z","credits":[{"lang":"en","value":"Jonah Burgess (CryptoCat), Senior Security Researcher, Rapid7","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-93637","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-16T15:18:20.000158Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T15:31:51.432Z"}}]}}}