{"id":"CVE-2026-109321","state":"PUBLISHED","title":"Grav Login OAuth Plugin before 1.4.3 Predictable Local Credentials Authentication Bypass","description":"Grav Login OAuth plugin (grav-plugin-login-oauth) before 1.4.3 provisions OAuth accounts as ordinary Grav users with a deterministic <provider>.<id> username and an unsalted MD5 hash of the provider identifier as the password, without disabling password login. Unauthenticated remote attackers who learn or guess a provider identifier can reproduce these credentials and log in, gaining administrative control of privileged accounts.","publishedAt":"2026-10-12T16:05:13.414Z","updatedAt":"2026-10-18T12:13:29.858Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["getgrav grav-plugin-login-oauth"],"affected":[{"vendor":"getgrav","product":"grav-plugin-login-oauth","defaultStatus":"unaffected","versions":[{"version":"1.0.0-beta.1","status":"affected","lessThan":"1.4.3","versionType":"semver"},{"version":"1.4.3","status":"unaffected","versionType":"semver"}],"repo":"https://github.com/getgrav/grav-plugin-login-oauth"}],"references":["https://github.com/getgrav/grav/security/advisories/GHSA-mj8v-hvf6-73gm","https://www.vulncheck.com/advisories/grav-login-oauth-plugin-before-1.4.3-predictable-local-credentials-authentication-bypass"],"weaknesses":["CWE-1391"],"ingestedAt":"2026-10-29T20:10:33.477Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/109xxx/CVE-2026-109321.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-109321","state":"PUBLISHED","datePublished":"2026-10-12T16:05:13.414Z","dateUpdated":"2026-10-18T12:13:29.858Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-12T14:15:29.011Z"},"containers":{"cna":{"title":"Grav Login OAuth Plugin before 1.4.3 Predictable Local Credentials Authentication Bypass","descriptions":[{"lang":"en","value":"Grav Login OAuth plugin (grav-plugin-login-oauth) before 1.4.3 provisions OAuth accounts as ordinary Grav users with a deterministic <provider>.<id> username and an unsalted MD5 hash of the provider identifier as the password, without disabling password login. 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