{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-62317","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-13T19:27:58.314Z","datePublished":"2026-08-19T19:41:23.800Z","dateUpdated":"2026-08-21T19:05:49.589Z"},"containers":{"cna":{"title":"Logto: ReDoS via unescaped user input in email subaddressing regex (blockSubaddressing)","problemTypes":[{"descriptions":[{"cweId":"CWE-1333","lang":"en","description":"CWE-1333: Inefficient Regular Expression Complexity","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/logto-io/logto/security/advisories/GHSA-qp7j-c3q2-g739","tags":["x_refsource_CONFIRM"],"url":"https://github.com/logto-io/logto/security/advisories/GHSA-qp7j-c3q2-g739"},{"name":"https://github.com/logto-io/logto/pull/9106","tags":["x_refsource_MISC"],"url":"https://github.com/logto-io/logto/pull/9106"},{"name":"https://github.com/logto-io/logto/commit/021381237511bc0d42f81d65df8b036b01f40547","tags":["x_refsource_MISC"],"url":"https://github.com/logto-io/logto/commit/021381237511bc0d42f81d65df8b036b01f40547"},{"name":"https://github.com/logto-io/logto/releases/tag/v1.41.0","tags":["x_refsource_MISC"],"url":"https://github.com/logto-io/logto/releases/tag/v1.41.0"}],"affected":[{"vendor":"logto-io","product":"logto","versions":[{"version":"< 1.41.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-19T19:41:23.800Z"},"descriptions":[{"lang":"en","value":"Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's email subaddressing blocklist in packages/core/src/libraries/sign-in-experience/email-blocklist-policy.ts used the attacker-controlled domain from email input to construct subaddressingRegex when blockSubaddressing was enabled. The permissive emailRegEx accepted multiple at signs and regular expression metacharacters, and POST /api/experience/verification/verification-code could therefore cause catastrophic backtracking in subaddressingRegex.test(email). The resulting event-loop stall could make authentication, token issuance, SSO, and the administrative console unavailable. This issue is fixed in version 1.41.0."}],"source":{"advisory":"GHSA-qp7j-c3q2-g739","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/logto-io/logto/security/advisories/GHSA-qp7j-c3q2-g739","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-21T19:05:23.350390Z","id":"CVE-2026-62317","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-21T19:05:49.589Z"}}]}}