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CVE-2026-53975 Bohdan Triapitsyn CVE debrief

OpenChamber 1.11.7 contains an unauthenticated remote code execution vulnerability that allows remote attackers to execute arbitrary shell commands by sending crafted POST requests to the /api/fs/exec endpoint, which passes commands verbatim to Node.js spawn() without any allowlist, blocklist, or argument validation. The vulnerability enables attackers to execute arbitrary OS commands as the application user and retrieve full command output including stdout, stderr, and exit code from the server response when UI_PASSWORD is not configured, matching the default Docker deployment. Evidence is limited to public sources and may not reflect the full scope or impact of the vulnerability. Defenders should verify affected deployments, review official advisories, and monitor for suspicious activity. The CVE record was published on 2026-08-06T15:16:55.827Z and has not been modified since then. This vulnerability has a CVSS score of 9.3 and a severity of CRITICAL.

Vendor
Bohdan Triapitsyn
Product
OpenChamber
CVSS
CRITICAL 9.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-06
Original CVE updated
2026-09-16
Advisory published
2026-08-06
Advisory updated
2026-09-16

Who should care

Users of OpenChamber 1.11.7, especially those with default Docker deployments or exposed /api/fs/exec endpoints, should prioritize remediation due to the critical severity and unauthenticated nature of the vulnerability. Operators, security teams, and vulnerability management teams should review affected scope, plan vendor-supported updates or mitigations, and implement compensating controls for exposed systems.

Technical summary

The vulnerability allows remote attackers to execute arbitrary shell commands by sending crafted POST requests to the /api/fs/exec endpoint, which passes commands verbatim to Node.js spawn() without any validation or sanitization. This occurs when UI_PASSWORD is not configured, such as in default Docker deployments. The vulnerability enables attackers to execute arbitrary OS commands as the application user and retrieve full command output.

Defensive priority

High

Recommended defensive actions

  • Inventory OpenChamber 1.11.7 deployments and verify UI_PASSWORD configuration
  • Restrict access to the /api/fs/exec endpoint
  • Implement allowlisting or blocklisting for Node.js spawn() commands
  • Monitor for suspicious POST requests to /api/fs/exec
  • Apply vendor remediation when available

Evidence notes

The vulnerability allows remote attackers to execute arbitrary OS commands as the application user and retrieve full command output including stdout, stderr, and exit code from the server response when UI_PASSWORD is not configured, matching the default Docker deployment. Evidence is limited to public sources and may not reflect the full scope or impact of the vulnerability. Defenders should verify affected deployments, review official advisories, and monitor for suspicious activity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53975 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53975

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-53975 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53975

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.