Threats Tagged 'cve-2026-54025'
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Threats Tagged 'cve-2026-54025'
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CVE-2026-54025: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in danny-avila LibreChatCVE-2026-54025 0 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. Join the discussion | CVE Database V5 | 06/25/2026, 15:53:17 UTC Added: 06/25/2026, 16:46:08 UTC |
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