CVE-2026-94111: Origin Validation Error in Tencent BrowserSkill
Tencent BrowserSkill versions up to 0.3.0 have an authentication bypass vulnerability in the local daemon WebSocket origin validation. The flaw allows any chrome-extension origin with 32 characters in the range a-p to be accepted, enabling attackers to register malicious extensions as browser clients. This can lead to interception and manipulation of page content, DOM, and screenshots returned to the AI agent.
AI Analysis
Technical Summary
CVE-2026-94111 describes an authentication bypass vulnerability in Tencent BrowserSkill through version 0.3.0. The local daemon's WebSocket origin validation improperly accepts any chrome-extension origin with 32 characters limited to the range a-p. This weakness allows attackers to register a malicious extension as a browser client, granting the ability to intercept and manipulate page content, the Document Object Model (DOM), and screenshots returned to the AI agent. The vulnerability has a CVSS 4.0 score of 6.9, indicating a medium severity level.
Potential Impact
An attacker who exploits this vulnerability can bypass authentication controls in the local daemon WebSocket origin validation, register a malicious browser extension, and thereby intercept and manipulate sensitive page content, DOM structures, and screenshots handled by the AI agent. This could compromise the integrity and confidentiality of data processed by the BrowserSkill application.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should exercise caution when installing browser extensions and monitor for vendor updates.
CVE-2026-94111: Origin Validation Error in Tencent BrowserSkill
Description
Tencent BrowserSkill versions up to 0.3.0 have an authentication bypass vulnerability in the local daemon WebSocket origin validation. The flaw allows any chrome-extension origin with 32 characters in the range a-p to be accepted, enabling attackers to register malicious extensions as browser clients. This can lead to interception and manipulation of page content, DOM, and screenshots returned to the AI agent.
CVSS v4.0
Score 6.9medium
Affected software
Tencent
BrowserSkill
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-94111 describes an authentication bypass vulnerability in Tencent BrowserSkill through version 0.3.0. The local daemon's WebSocket origin validation improperly accepts any chrome-extension origin with 32 characters limited to the range a-p. This weakness allows attackers to register a malicious extension as a browser client, granting the ability to intercept and manipulate page content, the Document Object Model (DOM), and screenshots returned to the AI agent. The vulnerability has a CVSS 4.0 score of 6.9, indicating a medium severity level.
Potential Impact
An attacker who exploits this vulnerability can bypass authentication controls in the local daemon WebSocket origin validation, register a malicious browser extension, and thereby intercept and manipulate sensitive page content, DOM structures, and screenshots handled by the AI agent. This could compromise the integrity and confidentiality of data processed by the BrowserSkill application.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should exercise caution when installing browser extensions and monitor for vendor updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-20T11:41:32.291Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ab05a5e55bf5e2cf5988bce
Added to database: 09/20/2026, 22:12:46 UTC
Last enriched: 09/20/2026, 22:13:52 UTC
Last updated: 09/21/2026, 01:48:46 UTC
Views: 4
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