CVE-2026-43899: CWE-20: Improper Input Validation in ThinkInAIXYZ deepchat
CVE-2026-43899 is a critical vulnerability in ThinkInAIXYZ's DeepChat platform prior to version 1. 0. 4-beta. 1. It involves improper input validation that allows an attacker or compromised AI endpoint to bypass security restrictions and execute arbitrary protocol commands remotely. The issue arises from incomplete mitigation of a previous vulnerability, where malicious Markdown links with target="_blank" can trigger native Electron pop-up handlers that directly invoke shell. openExternal(url) without proper URL validation. This leads to a remote code execution (RCE) risk. The vulnerability is fixed in version 1. 0.
AI Analysis
Technical Summary
DeepChat versions before 1.0.4-beta.1 suffer from an improper input validation vulnerability (CWE-20) that enables arbitrary protocol execution bypass leading to remote code execution. Although a prior patch restricted api.openExternal() in the renderer preload script, it failed to sanitize native Electron pop-up window handlers in tabPresenter.ts. This flaw allows malicious Markdown links with target="_blank" to be intercepted and passed unsanitized to shell.openExternal(url), bypassing the isValidExternalUrl security check. The vulnerability has a CVSS 3.1 score of 9.6, indicating critical severity. The issue is resolved in DeepChat v1.0.4-beta.1.
Potential Impact
Successful exploitation allows an attacker or compromised AI endpoint to execute arbitrary protocol handlers on the victim's system via unsanitized URLs, resulting in remote code execution with high confidentiality, integrity, and availability impact. This can lead to full system compromise of affected DeepChat installations prior to version 1.0.4-beta.1.
Mitigation Recommendations
Upgrade DeepChat to version 1.0.4-beta.1 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is documented. Patch status is not explicitly stated but the vendor has fixed the issue in the specified version.
CVE-2026-43899: CWE-20: Improper Input Validation in ThinkInAIXYZ deepchat
Description
CVE-2026-43899 is a critical vulnerability in ThinkInAIXYZ's DeepChat platform prior to version 1. 0. 4-beta. 1. It involves improper input validation that allows an attacker or compromised AI endpoint to bypass security restrictions and execute arbitrary protocol commands remotely. The issue arises from incomplete mitigation of a previous vulnerability, where malicious Markdown links with target="_blank" can trigger native Electron pop-up handlers that directly invoke shell. openExternal(url) without proper URL validation. This leads to a remote code execution (RCE) risk. The vulnerability is fixed in version 1. 0.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
DeepChat versions before 1.0.4-beta.1 suffer from an improper input validation vulnerability (CWE-20) that enables arbitrary protocol execution bypass leading to remote code execution. Although a prior patch restricted api.openExternal() in the renderer preload script, it failed to sanitize native Electron pop-up window handlers in tabPresenter.ts. This flaw allows malicious Markdown links with target="_blank" to be intercepted and passed unsanitized to shell.openExternal(url), bypassing the isValidExternalUrl security check. The vulnerability has a CVSS 3.1 score of 9.6, indicating critical severity. The issue is resolved in DeepChat v1.0.4-beta.1.
Potential Impact
Successful exploitation allows an attacker or compromised AI endpoint to execute arbitrary protocol handlers on the victim's system via unsanitized URLs, resulting in remote code execution with high confidentiality, integrity, and availability impact. This can lead to full system compromise of affected DeepChat installations prior to version 1.0.4-beta.1.
Mitigation Recommendations
Upgrade DeepChat to version 1.0.4-beta.1 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is documented. Patch status is not explicitly stated but the vendor has fixed the issue in the specified version.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-04T16:11:33.085Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a028743cbff5d86108b5068
Added to database: 5/12/2026, 1:49:55 AM
Last enriched: 5/12/2026, 1:51:31 AM
Last updated: 5/12/2026, 3:47:42 AM
Views: 2
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