Vulnerability in Parse-Community Parse-Server
CVE-2026-35200
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 8.6.73 and 9.7.1-alpha.4, a file can be uploaded with a filename extension that passes the file extension allowlist (e.g., .txt) but with a Content-Type header that differs from the extension (e.g., text/html). The Content-Type is passed to the storage adapter without consistency validation. Storage adapters that store and serve the provided Content-Type (such as S3 or GCS) serve the file with the mismatched Content-Type. The default GridFS adapter is not affected because it derives Content-Type from the filename at serving time. This vulnerability is fixed in 8.6.73 and 9.7.1-alpha.4.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (18.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Parse-Community Parse-Server — versions >= 9.0.0, < 9.7.1-alpha.4, < 8.6.73
- Parseplatform Parse-Server — versions 9.7.1
Weakness classification (CWE)
References
- github.com/parse-community/parse-server/security/advisories/GHSA-vr5f-2r24-w5hc (Patch, Mitigation, Vendor Advisory)
- github.com/parse-community/parse-server/pull/10383 (Patch, Issue Tracking)
- github.com/parse-community/parse-server/pull/10384 (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2026-35200?
- CVE-2026-35200 is a medium-severity vulnerability in Parse-Community Parse-Server, classified under CWE-436. CVSS score: 5.4/10. Published 2026-04-06.
- How severe is CVE-2026-35200?
- Medium severity. CVSS v3 base score is 5.4 out of 10.