Improper input validation in Parse-Community Parse-Server
CVE-2026-121415
Parse Server before 8.6.111 and 9.0.0 before 9.10.6-alpha.3 on MongoDB skips field type validation for null-valued dot notation keys, allowing sub-documents to be written beneath Pointer, Number, String, Date, or Boolean fields. Any client with write access, including unauthenticated clients where public writes are permitted, can corrupt field values, make objects unreadable via internal date fields, or break atomic operations on number fields.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
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-655c-2xf3-77x9 (vendor-advisory)
- github.com/parse-community/parse-server/pull/10804 (issue-tracking, patch)
- github.com/parse-community/parse-server/pull/10805 (issue-tracking, patch)
- www.vulncheck.com/advisories/parse-server-before-8.6.111-and-9.0.0-before-9.10… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-121415?
- CVE-2026-121415 is a low-severity vulnerability in Parse-Community Parse-Server, classified under Improper Input Validation. CVSS score: 3.7/10. Published 2026-11-03.
- How severe is CVE-2026-121415?
- Low severity. CVSS v3 base score is 3.7 out of 10.