How severe is CVE-2026-53820?

CVE-2026-53820 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-2026-53820 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-2026-53820?

CVE-2026-53820 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-53820?

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

Does CVE-2026-53820 have an EU (EUVD) identifier?

Yes. CVE-2026-53820 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36608.

When was CVE-2026-53820 published?

CVE-2026-53820 was published on 2026-06-12 and last updated on 2026-06-17.

CVE-2026-53820

CVE-2026-53820 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-2026-36608
Weakness: CWE-862
Affected product: Openclaw
Published: 2026-06-12
Last modified: 2026-06-17

Description

OpenClaw before 2026.5.12 contains an exec denylist bypass vulnerability in the bundle MCP loopback session-spawn path that allows authenticated callers to bypass intended command restrictions. Attackers can reach the affected bundled MCP session-spawn path to start sessions with broader command reach than intended.

Frequently asked questions

What is CVE-2026-53820?: OpenClaw before 2026.5.12 contains an exec denylist bypass vulnerability in the bundle MCP loopback session-spawn path that allows authenticated callers to bypass intended command restrictions. Attackers can reach the affected bundled MCP session-spawn path to start sessions with broader command reach than intended.
How severe is CVE-2026-53820?: CVE-2026-53820 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-2026-53820 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-2026-53820?: CVE-2026-53820 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-53820?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-53820 have an EU (EUVD) identifier?: Yes. CVE-2026-53820 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36608.
When was CVE-2026-53820 published?: CVE-2026-53820 was published on 2026-06-12 and last updated on 2026-06-17.

References

Affected products (1)

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

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