Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.

CVE-2026-55778 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.9.1-alpha.11 and 8.6.81, the default fileUpload.fileExtensions blocklist could be bypassed by uploading a file with a non-standard or compound extension and dangerous content type, allowing storage adapters such as S3 and GCS to serve attacker-supplied active content and enable stored cross-site scripting. This issue is fixed in versions 9.9.1-alpha.11 and 8.6.81.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://github.com/parse-community/parse-server/commit/97c6a78d19f976ec756c1295f08a8fccab90799a	[email protected]	Source CodeVendor
https://github.com/parse-community/parse-server/commit/be12a60d65b6e140481882037fb896b1f951df50	[email protected]	Source CodeVendor
https://github.com/parse-community/parse-server/pull/10505	[email protected]	Issue TrackingVendor
https://github.com/parse-community/parse-server/pull/10506	[email protected]	Issue TrackingVendor
https://github.com/parse-community/parse-server/releases/tag/8.6.81	[email protected]	Release NotesVendor
https://github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.11	[email protected]	Release NotesVendor
https://github.com/parse-community/parse-server/security/advisories/GHSA-v8x7-r927-cc93	[email protected]	AdvisoryRemedyVendor

see all 7 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-434	Unrestricted Upload of File with Dangerous Type	[email protected]

Affected Products

Product	Versions
Parse Server	>= 9.0.0, < 9.9.1-alpha.11 (semver) <= 8.6.80 (semver)
CPE cpe:2.3:a:parseplatform:parse-server::::::node.js::* cpe:2.3:a:parseplatform:parse-server:::::::: Remediation Upgrade: 9.9.1-alpha.11moderate efforthttps://github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.11 Upgrade: 8.6.81moderate efforthttps://github.com/parse-community/parse-server/releases/tag/8.6.81 Workaround:low effort Configure `fileUpload.fileExtensions` as a strict allowlist of only the file extensions your application needs (for example `["^(png\|jpe?g\|gif\|pdf)$"]`) instead of relying on the default blocklist. Mitigation:low effort Serve uploaded files from a separate domain than the application, so that any executed content is isolated from the application's origin.

Product

Versions

Parse Server

>= 9.0.0, < 9.9.1-alpha.11 (semver)

<= 8.6.80 (semver)

CPE

cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:*:*:*

Remediation

Upgrade: 9.9.1-alpha.11moderate efforthttps://github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.11
Upgrade: 8.6.81moderate efforthttps://github.com/parse-community/parse-server/releases/tag/8.6.81
Workaround:low effort
Configure `fileUpload.fileExtensions` as a strict allowlist of only the file extensions your application needs (for example `["^(png|jpe?g|gif|pdf)$"]`) instead of relying on the default blocklist.
Mitigation:low effort
Serve uploaded files from a separate domain than the application, so that any executed content is isolated from the application's origin.

Change History

2 change records found show changes

Date	Action	Recorded By
Jul 9, 2026	CVE Modified	CISA-ADP
Jul 8, 2026	New CVE Received	[email protected]