Cross-site scripting in LibreChat - CVE-2026-54025
Published: June 3, 2026
Vulnerability identifier: #VU133253
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-54025
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary script in the victim's browser.
The vulnerability exists due to cross-site scripting in the markdown artifact preview pipeline when rendering crafted markdown image alt text. A remote user can import a crafted conversation and share a public link to execute arbitrary script in the victim's browser.
User interaction is required to open the shared conversation link.
Affected software
LibreChat
How to mitigate CVE-2026-54025
Install security update from vendor's website.
LibreChat - update to 0.8.4 rc1