SEPTEMBER 17, 2026
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Case File

CVE-2026-55778

LOW · CVSS 2.1 EPSS 0.41% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-08 · Last synced 2026-08-07

CyberRota Analysis

AI-Generated

Parse Server versions prior to 9.9.1-alpha.11 and 8.6.81 are vulnerable due to a bypass in the default fileUpload.fileExtensions blocklist, allowing attackers to upload files with non-standard extensions and malicious content types. This vulnerability can lead to stored cross-site scripting (XSS) attacks, potentially compromising user data and application integrity. Organizations using affected versions should prioritize upgrading to the patched releases to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-55778
Severity
LOW
CVSS
2.1
EPSS
0.41%

Original NVD 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.