CVE-2026-94111

medium

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.

References

https://www.vulncheck.com/advisories/tencent-browserskill-through-0.3.0-origin-validation-error-in-local-websocket-daemon

https://github.com/Tencent/BrowserSkill/issues/273

https://github.com/Tencent/BrowserSkill/blob/cli-v0.3.0/crates/bsk-cli/src/daemon/ws.rs#L36-L57

Details

Source: Mitre, NVD

Published: 2026-09-20

Updated: 2026-09-21

Risk Information

CVSS v2

Base Score: 5.7

Vector: CVSS2#AV:L/AC:L/Au:S/C:P/I:C/A:P

Severity: Medium

CVSS v3

Base Score: 6.6

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

Severity: Medium

CVSS v4

Base Score: 6.9

Vector: 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

Severity: Medium

EPSS

EPSS: 0.00096