{"id":"CVE-2026-34574","aliases":["BIT-parse-2026-34574","GHSA-f6j3-w9v3-cq22"],"url":"https://o3.security/vulnerability/CVE-2026-34574","summary":"Parse Server: Session field immutability bypass via falsy-value guard","details":"### Impact\n\nAn authenticated user can bypass the immutability guard on session fields (`expiresAt`, `createdWith`) by sending a null value in a PUT request to the session update endpoint. This allows nullifying the session expiry, making the session valid indefinitely and bypassing configured session length policies.\n\n### Patches\n\nThe truthiness-based guard checks were replaced with key-presence checks that reject any value for protected session fields, including null.\n\n### Workarounds\n\nThere is no known workaround. A `beforeSave` trigger on `_Session` could be used to reject null values for `expiresAt` and `createdWith`.","published":"2026-03-31T15:08:31.013Z","modified":"2026-08-12T03:51:46.976990824Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"parse-server","fixedVersion":"9.7.0-alpha.14"},{"ecosystem":"npm","name":"parse-server","fixedVersion":"8.6.69"}],"fix":{"url":"https://github.com/parse-community/parse-server/commit/90802969fc713b7bc9733d7255c7519a6ed75d21","label":"parse-community/parse-server@9080296"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34574.json"},{"type":"ADVISORY","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-f6j3-w9v3-cq22"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34574"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/commit/90802969fc713b7bc9733d7255c7519a6ed75d21"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/commit/ebccd7fe2708007e62f705ee1c820a6766178777"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/pull/10347"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/pull/10348"},{"type":"PACKAGE","url":"https://github.com/parse-community/parse-server"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:46.976990824Z"}}