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TI-2026-24420 Aliases CVE-2026-31868GHSA-v5hf-f4c3-m5rv

Parse Server has Stored XSS via file upload of HTML-renderable file types

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.4 and 8.6.30, an attacker can upload a file with a file extension or content type that is not blocked by the default configuration of the Parse Server fileUpload.fileExtensions option. The file can contain malicious code, for example JavaScript in an SVG or XHTML file. When the file is accessed via its URL, the browser renders the file and executes the malicious code in the context of the Parse Server domain. This is a stored Cross-Site Scripting (XSS) vulnerability that can be exploited to steal session tokens, redirect users, or perform actions on behalf of other users. Affected file extensions and content types include .svgz, .xht, .xml, .xsl, .xslt, and content types application/xhtml+xml and application/xslt+xml for extensionless uploads. Uploading of .html, .htm, .shtml, .xhtml, and .svg files was already blocked. This vulnerability is fixed in 9.6.0-alpha.4 and 8.6.30.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00286 21st percentileScored 2026-11-07
Fix Fixed parse-server (parse-community): 8.6.30parse-server (npm): 9.6.0-alpha.4, 8.6.30

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
parse-communityparse-server>= 9.0.0 < 9.6.0-alpha.4; before 8.6.308.6.30Patch availableCNA
—parse-server (npm)9.0.0-alpha.1 to before 9.6.0-alpha.49.6.0-alpha.4Patch availableGHSA-v5hf-f4c3-m5rv
—parse-server (npm)before 8.6.308.6.30Patch availableGHSA-v5hf-f4c3-m5rv
  • parse-server Vendorparse-community Affected >= 9.0.0 < 9.6.0-alpha.4; before 8.6.30 Fixed in 8.6.30 Patch available CNA
  • parse-server (npm) Vendor— Affected 9.0.0-alpha.1 to before 9.6.0-alpha.4 Fixed in 9.6.0-alpha.4 Patch available GHSA-v5hf-f4c3-m5rv
  • parse-server (npm) Vendor— Affected before 8.6.30 Fixed in 8.6.30 Patch available GHSA-v5hf-f4c3-m5rv

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*before 8.6.30; 9.0.0 to before 9.6.0Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha1:*:*:*:node.js:*:*9.6.0 alpha1Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha2:*:*:*:node.js:*:*9.6.0 alpha2Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha3:*:*:*:node.js:*:*9.6.0 alpha3Vulnerableparse-community
  • cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* Versions before 8.6.30; 9.0.0 to before 9.6.0 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha1:*:*:*:node.js:*:* Versions 9.6.0 alpha1 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha2:*:*:*:node.js:*:* Versions 9.6.0 alpha2 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha3:*:*:*:node.js:*:* Versions 9.6.0 alpha3 Vulnerable ·parse-community

Remediation

  • Fix · CNA parse-server (parse-community) Fixed in 8.6.30
  • Fix · GHSA-v5hf-f4c3-m5rv parse-server (npm) Fixed in 9.6.0-alpha.4 Advisory →
  • Fix · GHSA-v5hf-f4c3-m5rv parse-server (npm) Fixed in 8.6.30 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-31868
  2. 2026-10-03 Alias added: GHSA-v5hf-f4c3-m5rv

References

Patch 1

Advisory 1

Other 3

  • TI-2022-08574 Command Injection in Parse server CVSS 3.1CRITICAL 10.0
  • TI-2024-18136 Parse Server literalizeRegexPart SQL Injection CVSS 3.1CRITICAL 10.0
  • TI-2022-18768 Parse Server vulnerable to Remote Code Execution via prototype pollution in MongoDB BSON parser CVSS 3.1CRITICAL 9.8
  • TI-2024-31550 Parse Server's custom object ID allows to acquire role privileges CVSS 3.1HIGH 8.1
  • TI-2023-18316 Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution CVSS 3.1CRITICAL 9.8
  • TI-2026-23790 Parse Server session token exfiltration via `redirectClassNameForKey` query parameter CVSS 4.0CRITICAL 9.9
See all 101 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences