{"id":"CVE-2026-32742","aliases":["BIT-parse-2026-32742","GHSA-5v7g-9h8f-8pgg"],"url":"https://o3.security/vulnerability/CVE-2026-32742","summary":"Parse Server session creation endpoint allows overwriting server-generated session fields","details":"Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.17 and 8.6.42, an authenticated user can overwrite server-generated session fields (`sessionToken`, `expiresAt`, `createdWith`) when creating a session object via `POST /classes/_Session`. This allows bypassing the server's session expiration policy by setting an arbitrary far-future expiration date. It also allows setting a predictable session token value. Starting in version 9.6.0-alpha.17 and 8.6.42, the session creation endpoint filters out server-generated fields from user-supplied data, preventing them from being overwritten. As a workaround, add a `beforeSave` trigger on the `_Session` class to validate and reject or strip any user-supplied values for `sessionToken`, `expiresAt`, and `createdWith`.","published":"2026-03-18T21:33:09.421Z","modified":"2026-08-12T03:51:18.693835966Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"parse-server","fixedVersion":"9.6.0-alpha.17"},{"ecosystem":"npm","name":"parse-server","fixedVersion":"8.6.42"}],"fix":{"url":"https://github.com/parse-community/parse-server/pull/10195","label":"parse-community/parse-server#10195"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32742.json"},{"type":"ADVISORY","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-5v7g-9h8f-8pgg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32742"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/pull/10195"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/pull/10196"},{"type":"PACKAGE","url":"https://github.com/parse-community/parse-server"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:18.693835966Z"}}