Monitor vulnerabilities like this one. Sign up free to get alerted when software you use is affected.

CVE-2026-43900: DeepChat prior to v1.0.4-beta.1 allows attackers to inject malicious code

CVE-2026-43900

Summary

DeepChat, an artificial intelligence platform, had a security weakness that allowed hackers to inject malicious code into the system. This could have led to unauthorized actions on the platform. The vulnerability has been fixed in version v1.0.4-beta.1, so it's essential to update to the latest version to ensure security.

Original title

Original description

DeepChat is an open-source artificial intelligence agent platform that unifies models, tools, and agents. Prior to v1.0.4-beta.1, a Cross-Site Scripting (XSS) vulnerability exists due to a discrepancy between the backend validation layer and the frontend browser rendering engine. The SVGSanitizer (src/main/lib/svgSanitizer.ts) restricts script execution by scrubbing javascript: protocols using plain-text regular expressions. However, it fails to account for HTML entity decoding prior to Vue's v-html DOM insertion inside the SvgArtifact.vue component. By feeding an SVG artifact with obfuscated entities (e.g., javascript:alert(1)), an attacker can completely bypass the sanitizer, culminating in arbitrary JavaScript execution when a victim interacts with the rendered SVG Element. This vulnerability is fixed in v1.0.4-beta.1.

nvd CVSS3.1 9.3

Vulnerability type

CWE-79 Cross-site Scripting (XSS)

https://github.com/ThinkInAIXYZ/deepchat/security/advisories/GHSA-7r59-67v3-3mgp

Published: 11 May 2026 · Updated: 28 May 2026 · First seen: 11 May 2026