How severe is CVE-2026-53864?

CVE-2026-53864 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-53864 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-53864?

CVE-2026-53864 primarily affects Openclaw. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-53864?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-53864 have an EU (EUVD) identifier?

Yes. CVE-2026-53864 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37166.

When was CVE-2026-53864 published?

CVE-2026-53864 was published on 2026-06-16 and last updated on 2026-06-18.

CVE-2026-53864

CVE-2026-53864 is a high-severity vulnerability in Openclaw with a CVSS 3.x base score of 8.1. 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-184.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v4: 7.6
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37166
Weakness: CWE-184
Affected product: Openclaw
Published: 2026-06-16
Last modified: 2026-06-18

Description

OpenClaw before 2026.5.26 contains an insufficient sanitization vulnerability in the host environment sanitizer that allows Node.js control variables to bypass validation. Attackers with access to workspace .env files, tool environment overrides, or skill environment blocks can pass malicious Node.js control variables to influence child processes or coverage output paths.

Frequently asked questions

What is CVE-2026-53864?: OpenClaw before 2026.5.26 contains an insufficient sanitization vulnerability in the host environment sanitizer that allows Node.js control variables to bypass validation. Attackers with access to workspace .env files, tool environment overrides, or skill environment blocks can pass malicious Node.js control variables to influence child processes or coverage output paths.
How severe is CVE-2026-53864?: CVE-2026-53864 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-53864 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-53864?: CVE-2026-53864 primarily affects Openclaw. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-53864?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-53864 have an EU (EUVD) identifier?: Yes. CVE-2026-53864 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37166.
When was CVE-2026-53864 published?: CVE-2026-53864 was published on 2026-06-16 and last updated on 2026-06-18.

References

Affected products (3)

cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
cpe:2.3:a:openclaw:openclaw:2026.5.26:beta1:*:*:*:node.js:*:*
cpe:2.3:a:openclaw:openclaw:2026.5.26:beta2:*:*:*:node.js:*:*

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