What’s Vulnerable › Vulnerabilities

CVE-2026-94111: Tencent BrowserSkill through 0.3.0 Origin Validation Error in Local WebSocket Daemon

• Severity: medium (CVSS 6.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-20 · updated 2026-09-22
• Weakness: CWE-346

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.

Affected products

• Tencent BrowserSkill: through 0.3.0

References

• https://github.com/Tencent/BrowserSkill/blob/cli-v0.3.0/crates/bsk-cli/src/daemon/ws.rs#L36-L57
• https://github.com/Tencent/BrowserSkill/issues/273
• https://www.vulncheck.com/advisories/tencent-browserskill-through-0.3.0-origin-validation-error-in-local-websocket-daemon

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