Information disclosure in Parse-Community Parse-Server
CVE-2026-30835
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.7 and 9.5.0-alpha.6, malformed $regex query parameter (e.g. [abc) causes the database to return a structured error object that is passed unsanitized through the API response. This leaks database internals such as error messages, error codes, code names, cluster timestamps, and topology details. The vulnerability is exploitable by any client that can send query requests, depending on the deployment's permission configuration. This issue has been patched in versions 8.6.7 and 9.5.0-alpha.6.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.2% 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: 0.004 · change: +0.001
Affected products
- Parse-Community Parse-Server — versions < 8.6.7, < 9.5.0-alpha.6
- Parseplatform Parse-Server — versions 9.5.0
Weakness classification (CWE)
References
- github.com/parse-community/parse-server/security/advisories/GHSA-9cp7-3q5w-j92g (Patch, Vendor Advisory)
- github.com/parse-community/parse-server/releases/tag/8.6.7 (Product, Release Notes)
- github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.6 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-30835?
- CVE-2026-30835 is a medium-severity vulnerability in Parse-Community Parse-Server, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 5.3/10. Published 2026-03-06.
- How severe is CVE-2026-30835?
- Medium severity. CVSS v3 base score is 5.3 out of 10.