CRITICAL 9.8 npm
Duplicate Advisory: Knowns Sandbox Escape: Unauthenticated Header Injection Grants AI Agent Unrestricted Access to Host Filesystem
GHSA-w47m-jpv2-qfw5
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Description
Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-9h2q-r9fh-f98w. This link is maintained to preserve external references.
Original Description
knowns versions before 0.31.0 fail to properly validate the x-opencode-directory request header in the /api/opencode proxy endpoint. Remote attackers can supply arbitrary directory paths to execute file operations outside the project root on the host system.
References
- WEB https://github.com/knowns-dev/knowns/security/advisories/GHSA-9h2q-r9fh-f98w
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-88899
- WEB https://github.com/knowns-dev/knowns/commit/37db0561b37b48b8bd035a417d7f1da6258ae657
- WEB https://github.com/knowns-dev/knowns/blob/v0.30.0/internal/server/server.go#L1283-L1296
- WEB https://github.com/knowns-dev/knowns/releases/tag/v0.31.0
- WEB https://www.vulncheck.com/advisories/knowns-before-0.31.0-external-control-of-agent-working-directory-via-x-opencode-directory-header
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