CVE-2026-43899
- Source
- https://cve.org/CVERecord?id=CVE-2026-43899
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43899.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-43899
- Aliases
-
- GHSA-cp8j-jx7q-7r5f
- Published
- 2026-05-11T21:42:54.916Z
- Modified
- 2026-07-15T01:48:58.984520351Z
- Severity
-
- 9.6 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H CVSS Calculator
- Summary
- DeepChat: Incomplete Fix for CVE-2025-55733 leads to Remote Code Execution via Markdown Links bypassing `isValidExternalUrl`
- Details
-
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.
- Database specific
{ "cwe_ids": [ "CWE-20" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43899.json", "cna_assigner": "GitHub_M" }- References