{"id":"CVE-2026-30949","aliases":["BIT-parse-2026-30949","GHSA-48mh-j4p5-7j9v"],"url":"https://o3.security/vulnerability/CVE-2026-30949","summary":"Parse Server is missing audience validation in Keycloak authentication adapter","details":"### Impact\n\nThe Keycloak authentication adapter does not validate the `azp` (authorized party) claim of Keycloak access tokens against the configured `client-id`. A valid access token issued by the same Keycloak realm for a *different* client application can be used to authenticate as any user on the Parse Server that uses the Keycloak adapter. This enables cross-application account takeover in multi-client Keycloak realms.\n\nAll Parse Server deployments that use the Keycloak authentication adapter with a Keycloak realm that has multiple client applications are affected.\n\n### Patches\n\nThe fix replaces the userinfo HTTP call with local JWT verification and enforces `azp` claim validation against the configured `client-id`.\n\n### Workarounds\n\nNone.\n\n### References\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v\n- Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5\n- Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.18","published":"2026-03-10T20:20:12.187Z","modified":"2026-08-12T03:51:37.868156332Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"parse-server","fixedVersion":"9.5.2-alpha.5"},{"ecosystem":"npm","name":"parse-server","fixedVersion":"8.6.18"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/parse-community/parse-server/releases/tag/8.6.18"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30949.json"},{"type":"ADVISORY","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-30949"},{"type":"PACKAGE","url":"https://github.com/parse-community/parse-server"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:37.868156332Z"}}