PT-2026-30320 · Amazon+2 · S3+2

Offset · Published 2026-04-04 · Updated 2026-04-08 · CVE-2026-35200

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Parse Server versions prior to 8.6.73 and 9.7.1-alpha.4

Description 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.

Recommendations Update to Parse Server version 8.6.73 or 9.7.1-alpha.4.

Fix

Weakness Enumeration

CWE-436

Related Identifiers

BIT-PARSE-2026-35200

CVE-2026-35200

GHSA-VR5F-2R24-W5HC

Affected Products

Gcs

Parse Server

S3

References · 8

• https://github.com/parse-community/parse-server/pull/10384 · Patch
• https://github.com/parse-community/parse-server/security/advisories/GHSA-vr5f-2r24-w5hc · Vendor Advisory
• https://github.com/parse-community/parse-server/pull/10383 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-35200 · Security Note
• https://osv.dev/vulnerability/GHSA-vr5f-2r24-w5hc · Vendor Advisory
• https://osv.dev/vulnerability/BIT-parse-2026-35200 · Vendor Advisory
• https://github.com/parse-community/parse-server · Note
• https://twitter.com/CVEnew/status/2041250710247940455 · Twitter Post