{"id":"CVE-2026-34373","aliases":["BIT-parse-2026-34373","GHSA-q3p6-g7c4-829c"],"url":"https://o3.security/vulnerability/CVE-2026-34373","summary":"Parse Server: GraphQL API endpoint ignores CORS origin restriction","details":"### Impact\n\nThe GraphQL API endpoint does not respect the `allowOrigin` server option and unconditionally allows cross-origin requests from any website. This bypasses origin restrictions that operators configure to control which websites can interact with the Parse Server API. The REST API correctly enforces the configured `allowOrigin` restriction.\n\n### Patches\n\nThe GraphQL API endpoint now uses the same CORS middleware as the REST API, ensuring the `allowOrigin` and `allowHeaders` server options are consistently enforced across all endpoints.\n\n### Workarounds\n\nThere is no known workaround other than upgrading.\n\n### Resources\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-q3p6-g7c4-829c\n- Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10334\n- Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10335","published":"2026-03-31T14:38:16.746Z","modified":"2026-08-12T03:51:26.064336473Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"parse-server","fixedVersion":"9.7.0-alpha.10"},{"ecosystem":"npm","name":"parse-server","fixedVersion":"8.6.66"}],"fix":{"url":"https://github.com/parse-community/parse-server/commit/0347641507891d0013ec57f7c10f012064f41263","label":"parse-community/parse-server@0347641"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34373.json"},{"type":"ADVISORY","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-q3p6-g7c4-829c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34373"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/commit/0347641507891d0013ec57f7c10f012064f41263"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/commit/4dd0d3d8be1c39664c74ad10bb0abaa76bc41203"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/pull/10334"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/pull/10335"},{"type":"PACKAGE","url":"https://github.com/parse-community/parse-server"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:26.064336473Z"}}