🛡️ CVE-2026-43899
🔴 CVSS 9.6 — Critical ✅ No Known Exploit CWE-20 NVD
9.6
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

DeepChat is an open-source artificial intelligence agent platform that unifies models, tools, and agents. Prior to v1.0.4-beta.1, An incomplete mitigation for CVE-2025-55733 leaves DeepChat vulnerable to an arbitrary protocol execution bypass (RCE). While the patch correctly restricted api.openExternal() inside the renderer's preload/index.ts script, it structurally neglected to sanitize native Electron pop-up window handlers. An attacker or a compromised AI endpoint returning a Markdown link can trigger a target="_blank" native window interception in tabPresenter.ts, which forwards the malicious URL directly to shell.openExternal(url) and completely bypasses the isValidExternalUrl security boundary. This vulnerability is fixed in v1.0.4-beta.1.

Details

Severity CRITICAL
CVSS Score 9.6
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE CWE-20
Public Exploit ✅ No
Source NVD
Published 2026-05-11
Updated 2026-06-02
Modified 2026-05-12
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

Similar Threats

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