Auth bypass in Parse-Community Parse-Server
CVE-2026-121413
Parse Server before 8.6.112 and 9.0.0 before 9.10.6-alpha.4 contains an authorization bypass in the session upgrade endpoint, which creates a new session for any valid session token without enforcing the _Session class create class-level permission. Attackers holding a user's session token can send an already revocable token to /upgradeToRevocableSession to obtain additional sessions with fresh expiration that persist after the original session is logged out.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/parse-community/parse-server/security/advisories/GHSA-2j2x-c587-q33g (vendor-advisory)
- github.com/parse-community/parse-server/pull/10808 (issue-tracking, patch)
- github.com/parse-community/parse-server/pull/10809 (issue-tracking, patch)
- www.vulncheck.com/advisories/parse-server-before-8.6.112-and-9.0.0-before-9.10… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-121413?
- CVE-2026-121413 is a low-severity vulnerability in Parse-Community Parse-Server, classified under Incorrect Authorization. CVSS score: 3.1/10. Published 2026-11-03.
- How severe is CVE-2026-121413?
- Low severity. CVSS v3 base score is 3.1 out of 10.