Cross-site scripting in Mongoose - CVE-2026-73254
Published: August 12, 2026
Vulnerability identifier: #VU142190
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-73254
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary script in a victim\'s browser.
The vulnerability exists due to cross-site scripting in the printdirentry() directory entry renderer when rendering directory listings with unescaped filenames. A remote attacker can create a file with a specially crafted filename to execute arbitrary script in a victim\'s browser.
Directory listing must be enabled, and user interaction is required to browse the affected directory listing page.
Affected software
Mongoose
How to mitigate CVE-2026-73254
Install security update from vendor's website.
Mongoose - update to 7.22