{"id":"CVE-2026-109321","summary":"Grav Login OAuth Plugin before 1.4.3 Predictable Local Credentials Authentication Bypass","details":"Grav Login OAuth plugin (grav-plugin-login-oauth) before 1.4.3 provisions OAuth accounts as ordinary Grav users with a deterministic \u003cprovider\u003e.\u003cid\u003e 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.","aliases":["GHSA-mj8v-hvf6-73gm"],"modified":"2026-10-13T02:46:45.948613617Z","published":"2026-10-12T16:05:13.414Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109321.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-1391"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109321.json"},{"type":"PACKAGE","url":"https://github.com/getgrav/grav-plugin-login-oauth"},{"type":"ADVISORY","url":"https://github.com/getgrav/grav/security/advisories/GHSA-mj8v-hvf6-73gm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109321"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/grav-login-oauth-plugin-before-1.4.3-predictable-local-credentials-authentication-bypass"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/getgrav/grav-plugin-login-oauth","events":[{"introduced":"db4d1e973bc2c9ecad045d88353a45722aca621e"},{"fixed":"7d642ca6bd8edc375422b704d3d30163df536ab0"}],"database_specific":{"extracted_events":[{"introduced":"1.0.0-beta.1"},{"fixed":"1.4.3"}],"source":"AFFECTED_FIELD"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109321.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}