CVE-2026-53976
Received Received - Intake

Path Traversal in OpenChamber File-Serving Endpoints

Publication date: 2026-08-06

Last updated on: 2026-08-06

Assigner: VulnCheck

Description
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.

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Meta Information

Published
2026-08-06
Last Modified
2026-08-06
Generated
2026-08-06
AI Q&A
2026-08-06
EPSS Evaluated
N/A
NVD
CVE-2026-53976
EUVD
EUVD-2026-53936

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
openchamber openchamber 1.11.7

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

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Executive Summary

OpenChamber 1.11.7 has a path traversal flaw in file-serving endpoints (/api/fs/read, /api/fs/stat, /api/fs/raw). Attackers can bypass workspace restrictions by using the allowOutsideWorkspace=true parameter with absolute paths. This lets them read sensitive files like JWT secrets, SSH keys, or credentials, potentially leading to full system compromise.

Detection Guidance

To detect this vulnerability, check if OpenChamber 1.11.7 is running and test the affected endpoints with curl commands. For example, try accessing /api/fs/read with allowOutsideWorkspace=true and an absolute path like /etc/passwd. If the server returns file contents, the vulnerability is present.

Impact Analysis

If you use OpenChamber 1.11.7, attackers could steal sensitive data such as authentication tokens, API keys, or configuration files. This could allow unauthorized access to your system, data breaches, or further attacks like session hijacking or privilege escalation.

Compliance Impact

This vulnerability could lead to unauthorized data access, violating GDPR (data protection) and HIPAA (health data privacy). Organizations may face fines, legal penalties, and reputational damage due to non-compliance with these regulations.

Mitigation Strategies

Immediately upgrade OpenChamber to a patched version if available. If not, disable or restrict access to the vulnerable endpoints /api/fs/read, /api/fs/stat, and /api/fs/raw. Review server logs for signs of exploitation and revoke any exposed credentials or session tokens.

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