{"api_version":"1","generated_at":"2026-06-25T04:53:08+00:00","cve":"CVE-2026-55759","urls":{"html":"https://cve.report/CVE-2026-55759","api":"https://cve.report/api/cve/CVE-2026-55759.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-55759","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-55759"},"summary":{"title":"Rocket.Chat: Apple Sign-In skips JWT claims validation, allowing expired and cross-audience token replay","description":"Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13, Rocket.Chat's Apple Sign-In handler verifies JWT signatures but skips claims validation. Any Apple-signed JWT with a non-empty iss is accepted regardless of aud, exp, nbf, or nonce. An attacker who obtains a target user's Apple identity token (from server logs, an intercepted sign-in flow, or another application sharing the same Apple developer team) can replay it to authenticate as that user, with no expiration on the replay window. This vulnerability is fixed in 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-06-24 22:16:49","updated_at":"2026-06-24 22:16:49"},"problem_types":["CWE-287","CWE-294","CWE-287 CWE-287: Improper Authentication","CWE-294 CWE-294: Authentication Bypass by Capture-replay"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"7.4","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":7.4,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.4","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"references":[{"url":"https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-c75c-5hc7-j4vp","name":"https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-c75c-5hc7-j4vp","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55759","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55759","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"RocketChat","product":"Rocket.Chat","version":"affected >= 8.5.0-rc.0, < 8.5.1","platforms":[]},{"source":"CNA","vendor":"RocketChat","product":"Rocket.Chat","version":"affected >= 8.4.0-rc.0, < 8.4.4","platforms":[]},{"source":"CNA","vendor":"RocketChat","product":"Rocket.Chat","version":"affected >= 8.3.0-rc.0, < 8.3.6","platforms":[]},{"source":"CNA","vendor":"RocketChat","product":"Rocket.Chat","version":"affected >= 8.2.0-rc.0, < 8.2.6","platforms":[]},{"source":"CNA","vendor":"RocketChat","product":"Rocket.Chat","version":"affected >= 8.1.0-rc.0, < 8.1.6","platforms":[]},{"source":"CNA","vendor":"RocketChat","product":"Rocket.Chat","version":"affected >= 7.11.0-rc.0, < 8.0.7","platforms":[]},{"source":"CNA","vendor":"RocketChat","product":"Rocket.Chat","version":"affected < 7.10.13","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"Rocket.Chat","vendor":"RocketChat","versions":[{"status":"affected","version":">= 8.5.0-rc.0, < 8.5.1"},{"status":"affected","version":">= 8.4.0-rc.0, < 8.4.4"},{"status":"affected","version":">= 8.3.0-rc.0, < 8.3.6"},{"status":"affected","version":">= 8.2.0-rc.0, < 8.2.6"},{"status":"affected","version":">= 8.1.0-rc.0, < 8.1.6"},{"status":"affected","version":">= 7.11.0-rc.0, < 8.0.7"},{"status":"affected","version":"< 7.10.13"}]}],"descriptions":[{"lang":"en","value":"Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13, Rocket.Chat's Apple Sign-In handler verifies JWT signatures but skips claims validation. Any Apple-signed JWT with a non-empty iss is accepted regardless of aud, exp, nbf, or nonce. An attacker who obtains a target user's Apple identity token (from server logs, an intercepted sign-in flow, or another application sharing the same Apple developer team) can replay it to authenticate as that user, with no expiration on the replay window. This vulnerability is fixed in 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13."}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-294","description":"CWE-294: Authentication Bypass by Capture-replay","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-06-24T21:07:29.331Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-c75c-5hc7-j4vp","tags":["x_refsource_CONFIRM"],"url":"https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-c75c-5hc7-j4vp"}],"source":{"advisory":"GHSA-c75c-5hc7-j4vp","discovery":"UNKNOWN"},"title":"Rocket.Chat: Apple Sign-In skips JWT claims validation, allowing expired and cross-audience token replay"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-55759","datePublished":"2026-06-24T21:07:29.331Z","dateReserved":"2026-06-17T14:34:51.880Z","dateUpdated":"2026-06-24T21:07:29.331Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 22:16:49","lastModifiedDate":"2026-06-24 22:16:49","problem_types":["CWE-287","CWE-294","CWE-287 CWE-287: Improper Authentication","CWE-294 CWE-294: Authentication Bypass by Capture-replay"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":7.4,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":5.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"55759","Ordinal":"1","Title":"Rocket.Chat: Apple Sign-In skips JWT claims validation, allowing","CVE":"CVE-2026-55759","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"55759","Ordinal":"1","NoteData":"Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13, Rocket.Chat's Apple Sign-In handler verifies JWT signatures but skips claims validation. Any Apple-signed JWT with a non-empty iss is accepted regardless of aud, exp, nbf, or nonce. An attacker who obtains a target user's Apple identity token (from server logs, an intercepted sign-in flow, or another application sharing the same Apple developer team) can replay it to authenticate as that user, with no expiration on the replay window. This vulnerability is fixed in 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13.","Type":"Description","Title":"Rocket.Chat: Apple Sign-In skips JWT claims validation, allowing"}]}}}