Path Traversal in Bohdan Triapitsyn Openchamber
CVE-2026-53976
OpenChamber 1.11.7 contains a path traversal vulnerability in the file-serving endpoints /api/fs/read, /api/fs/stat, and /api/fs/raw that allows unauthenticated remote attackers to read arbitrary files by supplying the allowOutsideWorkspace=true query parameter alongside an absolute path, bypassing the workspace boundary check in resolveReadPathFromContext. Attackers can exploit the vacuous isPathWithinRoot guard to read sensitive files such as the JWT signing secret, SSH private keys, API credentials, and environment variables, enabling full authentication bypass by forging session cookies on password-protected deployments.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.019 (78.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Bohdan Triapitsyn Openchamber — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-53976?
- CVE-2026-53976 is a critical-severity vulnerability in Bohdan Triapitsyn Openchamber, classified under Path Traversal. CVSS score: 9.1/10. Published 2026-08-06.
- How severe is CVE-2026-53976?
- Critical severity. CVSS v3 base score is 9.1 out of 10.