CVE-2026-35200
Parse Server has a file upload Content-Type override via extension mismatch
Description
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.
INFO
Published Date :
April 6, 2026, 8:16 p.m.
Last Modified :
July 24, 2026, 9:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Update Parse Server to version 8.6.73 or later.
- Update Parse Server to version 9.7.1-alpha.4 or later.
- Ensure Content-Type validation is consistently applied.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-35200.
| URL | Resource |
|---|---|
| https://github.com/parse-community/parse-server/pull/10383 | Issue Tracking Patch |
| https://github.com/parse-community/parse-server/pull/10384 | Issue Tracking Patch |
| https://github.com/parse-community/parse-server/security/advisories/GHSA-vr5f-2r24-w5hc | Mitigation Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-35200 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-35200
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-35200 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-35200 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: parse-server de parse-community, Description: Parse Server es un backend de código abierto que puede ser desplegado en cualquier infraestructura que pueda ejecutar Node.js. Antes de 8.6.73 y 9.7.1-alpha.4, se puede subir un archivo con una extensión de nombre de archivo que pasa la lista de permitidos de extensiones de archivo (por ejemplo, .txt) pero con una cabecera Content-Type que difiere de la extensión (por ejemplo, text/html). El Content-Type se pasa al adaptador de almacenamiento sin validación de consistencia. Los adaptadores de almacenamiento que almacenan y sirven el Content-Type proporcionado (como S3 o GCS) sirven el archivo con el Content-Type no coincidente. El adaptador GridFS predeterminado no se ve afectado porque deriva el Content-Type del nombre de archivo en el momento de la entrega. Esta vulnerabilidad está corregida en 8.6.73 y 9.7.1-alpha.4. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'parse-community', 'product': 'parse-server', 'versions': [{'status': 'affected', 'version': '>= 9.0.0, < 9.7.1-alpha.4'}, {'status': 'affected', 'version': '< 8.6.73'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-35200', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-04-07T14:02:43.253229Z'} -
Initial Analysis by [email protected]
Apr. 07, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* versions from (including) 9.0.0 up to (excluding) 9.7.1 *cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* versions up to (excluding) 8.6.73 *cpe:2.3:a:parseplatform:parse-server:9.7.1:alpha1:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.7.1:alpha2:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.7.1:alpha3:*:*:*:node.js:*:* Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/pull/10383 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/pull/10384 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/security/advisories/GHSA-vr5f-2r24-w5hc Types: Mitigation, Patch, Vendor Advisory -
New CVE Received by [email protected]
Apr. 06, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-436 Added Reference https://github.com/parse-community/parse-server/pull/10383 Added Reference https://github.com/parse-community/parse-server/pull/10384 Added Reference https://github.com/parse-community/parse-server/security/advisories/GHSA-vr5f-2r24-w5hc