What’s Vulnerable › Vulnerabilities
CVE-2026-89039: Arbitrary file read via the convert_playwright_script prompt in mcp-k6
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-05 · updated 2026-10-06
- Weakness: CWE-22
Description
A caller who can invoke the convert_playwright_script prompt in mcp-k6 can pass a bare file path as the playwright_script argument and receive the contents of any file readable by the user running the server, including SSH keys and cloud credentials in that user's home directory (path traversal). The working-directory restriction applied to '@'-prefixed paths can also be bypassed with a symbolic link inside the working directory that points outside it.
Affected products
- Grafana mcp-k6: from 0.3.0 before 0.7.0 — fixed in 0.7.0
How to fix
Upgrade to a fixed version: Grafana mcp-k6 0.7.0. Check the vendor advisory for mitigations.
References
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