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CVE-2026-53818 OpenClaw CVE debrief

CVE-2026-53818 is a MEDIUM-severity vulnerability in OpenClaw, a software framework. The vulnerability exists in the MCP loopback feature and allows non-owner callers to bypass owner-only tool policies and before-tool-call hooks. This could enable attackers to execute restricted tools when the feature is enabled and reachable. The vulnerability was published on [cvePublishedAt] and modified on [cveModifiedAt].

Vendor
OpenClaw
Product
Unknown
CVSS
MEDIUM 6.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-11
Original CVE updated
2026-06-12
Advisory published
2026-06-11
Advisory updated
2026-06-12

Who should care

Users of OpenClaw, especially those who have enabled the MCP loopback feature, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability has a CVSS score of 6.9 and is classified as CWE-862. It allows local attackers with low privileges to execute restricted tools. The affected version of OpenClaw is before 2026.4.24.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update OpenClaw to version 2026.4.24 or later.
  • Disable the MCP loopback feature if not in use.
  • Restrict access to the feature to only authorized users.

Evidence notes

Evidence for this CVE comes from the NVD and the OpenClaw security advisory.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53818 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53818

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

  • CVE-2026-53818 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53818

    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.