How severe is CVE-2026-53818?

CVE-2026-53818 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability low.

Is CVE-2026-53818 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-53818?

CVE-2026-53818 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-53818?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-53818 have an EU (EUVD) identifier?

Yes. CVE-2026-53818 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36324.

When was CVE-2026-53818 published?

CVE-2026-53818 was published on 2026-06-11 and last updated on 2026-06-17.

CVE-2026-53818

CVE-2026-53818 is a medium-severity vulnerability in Openclaw with a CVSS 3.x base score of 6.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: Medium (CVSS 3.x base score 6.6)
CVSS v4: 6.9
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36324
Weakness: CWE-862
Affected product: Openclaw
Published: 2026-06-11
Last modified: 2026-06-17

Description

OpenClaw before 2026.4.24 contains an authorization bypass vulnerability in the MCP loopback feature that allows non-owner callers to skip owner-only tool policies and before-tool-call hooks. Attackers can invoke owner-only behavior through the affected loopback path to execute restricted tools when the feature is enabled and reachable.

Frequently asked questions

What is CVE-2026-53818?: OpenClaw before 2026.4.24 contains an authorization bypass vulnerability in the MCP loopback feature that allows non-owner callers to skip owner-only tool policies and before-tool-call hooks. Attackers can invoke owner-only behavior through the affected loopback path to execute restricted tools when the feature is enabled and reachable.
How severe is CVE-2026-53818?: CVE-2026-53818 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability low.
Is CVE-2026-53818 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-53818?: CVE-2026-53818 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-53818?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-53818 have an EU (EUVD) identifier?: Yes. CVE-2026-53818 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36324.
When was CVE-2026-53818 published?: CVE-2026-53818 was published on 2026-06-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*

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