Vulnerability in Parse-Community Parse-Server
CVE-2026-34224
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.64 and 9.7.0-alpha.8, an attacker who possesses a valid authentication provider token and a single MFA recovery code or SMS one-time password can create multiple authenticated sessions by sending concurrent login requests via the authData login endpoint. This defeats the single-use guarantee of MFA recovery codes and SMS one-time passwords, allowing session persistence even after the legitimate user revokes detected sessions. This issue has been patched in versions 8.6.64 and 9.7.0-alpha.8.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (25.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Parse-Community Parse-Server — versions < 8.6.64, >= 9.0.0, < 9.7.0-alpha.8
- Parseplatform Parse-Server — versions 9.7.0
Weakness classification (CWE)
References
- github.com/parse-community/parse-server/security/advisories/GHSA-w73w-g5xw-rwhf (Patch, Vendor Advisory)
- github.com/parse-community/parse-server/pull/10326 (Patch, Issue Tracking)
- github.com/parse-community/parse-server/pull/10327 (Patch, Issue Tracking)
- github.com/parse-community/parse-server/commit/661f160edac8daac0486bc94413cf965… (Patch)
- github.com/parse-community/parse-server/commit/e7efbebba398ce6abe5b6b6fb9829c6e… (Patch)
Frequently asked questions
- What is CVE-2026-34224?
- CVE-2026-34224 is a medium-severity vulnerability in Parse-Community Parse-Server, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 4.4/10. Published 2026-03-31.
- How severe is CVE-2026-34224?
- Medium severity. CVSS v3 base score is 4.4 out of 10.