{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.41.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "021381237511bc0d42f81d65df8b036b01f40547"
            },
            {
              "fixed": "91e55698a42f99438cd41ec2b16a1fc51dbdab8a"
            }
          ],
          "repo": "https://github.com/logto-io/logto",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-qp7j-c3q2-g739"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1333"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62317.json"
  },
  "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.",
  "id": "CVE-2026-62317",
  "modified": "2026-09-11T03:30:34.191149936Z",
  "published": "2026-08-19T19:41:23.800Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/logto-io/logto/releases/tag/v1.41.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62317.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/logto-io/logto/security/advisories/GHSA-qp7j-c3q2-g739"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-62317"
    },
    {
      "type": "FIX",
      "url": "https://github.com/logto-io/logto/commit/021381237511bc0d42f81d65df8b036b01f40547"
    },
    {
      "type": "FIX",
      "url": "https://github.com/logto-io/logto/pull/9106"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Logto: ReDoS via unescaped user input in email subaddressing regex (blockSubaddressing)"
}