CVE-2026-35200
published 2026-04-06CVE-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…
PriorityP428medium5.4CVSS 3.1
AVNACLPRLUIRSCCLILAN
EPSS
0.16%
5.8th percentile
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.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| parse-community | parse-server | < 8.6.73 | 8.6.73 |
| parse-community | parse-server | — | — |
| parse-community | parse-server | >= 0 < 8.6.73 | 8.6.73 |
| parse-community | parse-server | >= 9.0.0 < 9.7.1-alpha.4 | 9.7.1-alpha.4 |
| parseplatform | parse-server | < 8.6.73 | 8.6.73 |
| parseplatform | parse-server | — | — |
| parseplatform | parse-server | >= 9.0.0 < 9.7.1 | 9.7.1 |
CVSS provenance
nvdv3.15.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
nvdv4.02.1LOWCVSS:4.0/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
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OSV
Parse Server: File upload Content-Type override via extension mismatch
osv·2026-04-04
CVE-2026-35200 [LOW] Parse Server: File upload Content-Type override via extension mismatch
Parse Server: File upload Content-Type override via extension mismatch
### Impact
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.
### Patches
The file upload now derives the Content-Type from the filename extension, overriding any user-provided Content-Type when the file has an extension.
### Workarounds
Configure the stor
GHSA
Parse Server: File upload Content-Type override via extension mismatch
ghsa·2026-04-04
CVE-2026-35200 [LOW] CWE-436 Parse Server: File upload Content-Type override via extension mismatch
Parse Server: File upload Content-Type override via extension mismatch
### Impact
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.
### Patches
The file upload now derives the Content-Type from the filename extension, overriding any user-provided Content-Type when the file has an extension.
### Workarounds
Configure the stor
No detection rules found.
No public exploits indexed.
2026-04-06
Published