{"id":"GHSA-jc39-686j-wp6q","summary":"Parse Server's Session Update endpoint allows overwriting server-generated session fields","details":"### Impact\n\nAn authenticated user can overwrite server-generated session fields such as `expiresAt` and `createdWith` when updating their own session via the REST API. This allows bypassing the server's configured session lifetime policy, making a session effectively permanent.\n\n### Patches\n\nThe fix blocks authenticated users from setting `expiresAt` and `createdWith` fields when updating a session. Master key and maintenance key operations are not affected.\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-jc39-686j-wp6q\n- Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10263\n- Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10264","aliases":["BIT-parse-2026-33527","CVE-2026-33527"],"modified":"2026-03-30T14:06:19.232139Z","published":"2026-03-24T16:34:11Z","database_specific":{"nvd_published_at":"2026-03-24T19:16:54Z","cwe_ids":["CWE-863"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-03-24T16:34:11Z"},"references":[{"type":"WEB","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-jc39-686j-wp6q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33527"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/pull/10263"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/pull/10264"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/commit/26b628c8fb3cc79ea955374769eebcff6f8a8a73"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/commit/ea68fc0b22a6056c9675149469ff57817f7cf984"},{"type":"PACKAGE","url":"https://github.com/parse-community/parse-server"}],"affected":[{"package":{"name":"parse-server","ecosystem":"npm","purl":"pkg:npm/parse-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"9.0.0"},{"fixed":"9.6.0-alpha.48"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-jc39-686j-wp6q/GHSA-jc39-686j-wp6q.json"}},{"package":{"name":"parse-server","ecosystem":"npm","purl":"pkg:npm/parse-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.6.57"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-jc39-686j-wp6q/GHSA-jc39-686j-wp6q.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}