{"id":"CVE-2026-62317","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-62317","summary":"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…","details":"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.","published":"2026-08-19T20:17:19.890","modified":"2026-08-19T20:17:19.890","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/logto-io/logto/commit/021381237511bc0d42f81d65df8b036b01f40547","label":"logto-io/logto@0213812"},"references":[{"type":"WEB","url":"https://github.com/logto-io/logto/commit/021381237511bc0d42f81d65df8b036b01f40547"},{"type":"WEB","url":"https://github.com/logto-io/logto/pull/9106"},{"type":"WEB","url":"https://github.com/logto-io/logto/releases/tag/v1.41.0"},{"type":"WEB","url":"https://github.com/logto-io/logto/security/advisories/GHSA-qp7j-c3q2-g739"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-19T20:17:19.890"}}