Parse Server 9.0.0 Stored XSS via malformed Content-Type
Parse Server is affected by a stored cross-site scripting (XSS) vulnerability in versions >= 9.0.0, < 9.10.0 and <= 8.6.83. When an uploaded file's extension is not recognized by the mime package, Parse Server preserves the client-supplied Content-Type. A malformed Content-Type that is not a valid type/subtype media type (e.g., 'image', 'image/', or 'image//svg+xml') bypasses the fileUpload.fileExtensions blocklist and is stored unchanged. On storage adapters that persist and serve the uploaded Content-Type (such as Amazon S3, Google Cloud Storage, or Azure Blob Storage), a browser cannot parse the malformed value and falls back to MIME-sniffing; a file whose body begins with HTML is rendered as HTML, executing embedded script in the application's origin against other users who open the file URL. The default GridFS storage adapter is not affected. Fixed in 9.10.0 and 8.6.84.
BIT-parse-2026-61448
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:BIT-parse-2026-61448
parse
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 8.6.84
Source reference:
/affected/0/ranges9.10.0Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.6.84"
},
{
"introduced": "9.0.0"
},
{
"fixed": "9.10.0"
}
]
}
],
"package": {
"name": "parse",
"purl": "pkg:bitnami/parse",
"ecosystem": "Bitnami"
},
"severity": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:L/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"
}
],
"database_specific": {
"source": "https://github.com/bitnami/vulndb/tree/main/data/parse/BIT-parse-2026-61448.json"
}
}
]- Related CVEs
- CVE-2026-61448
Source reference:
/aliases
Publisher severity
low
Source reference: /database_specific/severity
- Event
- #15356 · Revision 1
- Added to Heist Feed
- Publisher date