{"id":"CVE-2026-93637","aliases":["EUVD-2026-101460","GHSA-gm33-c835-gc8h"],"status":"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.","severity":{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00325,"percentile":0.25881,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-307"],"published":"2026-10-14T16:25:23Z","modified":"2026-10-16T19:55:59Z","products":[{"vendor":"zimbra","product":"zimbra collaboration suite"}],"references":[{"url":"https://www.rapid7.com/blog/post/ve-breaking-zimbra-identity-boundaries-part-1","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93637"},{"url":"https://github.com/advisories/GHSA-gm33-c835-gc8h"}],"sources":{"cve":[{"id":"CVE-2026-93637","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.","status":"published","published":"2026-10-14T16:25:23.436Z","modified":"2026-10-16T15:31:51.432Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:19:54.122945Z"}],"euvd":[{"id":"EUVD-2026-101460","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.","status":"published","published":"2026-10-14T16:25:23Z","modified":"2026-10-16T15:31:51Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-02T17:00:05.229655Z"}],"ghsa":[{"id":"GHSA-gm33-c835-gc8h","title":"An authentication rate-limit bypass in Zimbra Collaboration Suite 10.1.0 through 10.1.21 allows...","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.","status":"published","published":"2026-10-14T18:32:27Z","modified":"2026-10-14T18:32:30Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T15:13:28.02433Z"}],"nvd":[{"id":"CVE-2026-93637","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.","status":"published","published":"2026-10-14T17:20:21.43Z","modified":"2026-10-16T19:55:59.74Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"secondary"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:12:59.328869Z"}]}}