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PatchSiren cyber security CVE debrief

CVE-2026-53855 OpenClaw CVE debrief

CVE-2026-53855 is a HIGH-severity vulnerability in OpenClaw, a software that enables users to manage and automate various tasks. The vulnerability, which has a CVSS score of 7.6, allows authenticated operators to bypass strict allowlist checks via shell positional parameters, potentially enabling the execution of unapproved shell-provided content.

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 2026.4.2 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability exists in OpenClaw before 2026.4.2 and allows authenticated operators to weaken strict allowlist checks via shell positional parameters. This can be exploited by combining allowlisted tools with shell positional arguments to place inline-eval content in shell carriers outside intended allowlist rules.

Defensive priority

HIGH

Recommended defensive actions

  • Update OpenClaw to version 2026.4.2 or later.
  • Restrict access to authenticated operators.
  • Monitor for suspicious activity.

Evidence notes

The CVE-2026-53855 vulnerability was published on [cvePublishedAt] and modified on [cveModifiedAt]. The vulnerability has been reported by Vulncheck and can be found in the NVD database.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53855 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53855

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

  • CVE-2026-53855 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53855

    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.