Is CVE-2026-54025 actively exploited?

No active exploitation of CVE-2026-54025 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-54025 be exploited remotely?

Yes. CVE-2026-54025 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-54025?

CVE-2026-54025 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2026-54025

CWE-79Published: June 25, 2026· Updated: Jun 29, 2026

5.4

CVSS v3.1

EPSS:0.13%probability of exploitation in 30 daysPercentile:3.2th

Official Description

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, there is a vulnerability in LibreChat's markdown artifact preview pipeline. The marked library v15.0.12 does not HTML-escape double-quote characters in image alt text when a custom renderer falls through to the default renderer. LibreChat's generateMarkdownHtml function (in client/src/utils/markdown.ts) installs a custom image renderer that returns false for URLs passing the isSafeUrl allowlist check, which causes marked to fall back to its built-in renderer. That built-in renderer inserts the raw alt text into the alt="..." attribute without escaping double-quote characters. An attacker can craft an alt text such as " onload="payload to break out of the attribute and inject an arbitrary event handler. The resulting HTML is then assigned to document.getElementById('content').innerHTML inside the Sandpack preview iframe, causing the payload to execute in the victim's browser. This vulnerability is fixed in 0.8.4-rc1.

NVD Source

Technical Analysis

CVE-2026-54025 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.