PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-53866 OpenClaw CVE debrief

CVE-2026-53866 is a HIGH-severity vulnerability in OpenClaw, a software that contains an allowlist bypass vulnerability in shell inline-command parsing. This vulnerability, with a CVSS score of 7.6, allows authenticated operators to execute unapproved commands. A command request using shell inline-command forms could route through a parser case missing the expected allowlist decision, enabling shell content execution without intended approval prompts.

Vendor
OpenClaw
Product
Unknown
CVSS
HIGH 7.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-16
Original CVE updated
2026-06-18
Advisory published
2026-06-16
Advisory updated
2026-06-18

Who should care

Users of OpenClaw before version 2026.5.12, particularly those with authenticated operators, should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability exists in the shell inline-command parsing of OpenClaw. Specifically, a command request using shell inline-command forms could bypass the allowlist, leading to the execution of unapproved commands. This is possible because the parser case misses the expected allowlist decision.

Defensive priority

HIGH

Recommended defensive actions

  • Update OpenClaw to version 2026.5.12 or later.
  • Review and restrict authenticated operator access to sensitive functionality.
  • Monitor OpenClaw logs for suspicious activity.

Evidence notes

The CVE-2026-53866 record was obtained from the official CVE database and the NVD detail page. Additional information was sourced from Vulncheck's advisory on the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53866 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53866

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

  • CVE-2026-53866 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53866

    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.