CVE-2026-94111
Tencent BrowserSkill through 0.3.0 Origin Validation Error in Local WebSocket Daemon
- State
- Published
- Severity
- 6.9 Medium
- Published
- Sep 20, 2026
- Updated
- Sep 21, 2026
- Reserved
- Sep 20, 2026
Description
Tencent BrowserSkill through 0.3.0 contains an authentication bypass vulnerability in the local daemon WebSocket origin validation that accepts any chrome-extension origin with 32 characters in range a-p. Attackers can register a malicious extension as a browser client to intercept and manipulate page content, DOM, and screenshots returned to the AI agent.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.6 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L | VulnCheck |
Weaknesses
- CWE-346 Origin Validation Error
Affected Products
| Product | Versions |
|---|---|
BrowserSkillTencent |
|
References
- https://github.com/Tencent/BrowserSkill/issues/273issue-tracking
- https://github.com/Tencent/BrowserSkill/blob/cli-v0.3.0/crates/bsk-cli/src/daemon/ws.rs#L36-L57technical-description
- VulnCheck Advisory: Tencent BrowserSkill through 0.3.0 Origin Validation Error in Local WebSocket Daemonthird-party-advisory
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