How severe is CVE-2026-53855?

CVE-2026-53855 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-2026-53855 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-53855?

CVE-2026-53855 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-53855?

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-2026-53855 have an EU (EUVD) identifier?

Yes. CVE-2026-53855 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37157.

When was CVE-2026-53855 published?

CVE-2026-53855 was published on 2026-06-16 and last updated on 2026-06-18.

CVE-2026-53855

CVE-2026-53855 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% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37157
Weakness: CWE-184
Affected product: Openclaw
Published: 2026-06-16
Last modified: 2026-06-18

Description

OpenClaw before 2026.4.2 contains an inline-eval bypass vulnerability allowing authenticated operators to weaken strict allowlist checks via shell positional parameters. Attackers can combine allowlisted tools with shell positional arguments to place inline-eval content in shell carriers outside intended allowlist rules, enabling execution of unapproved shell-provided content.

Frequently asked questions

What is CVE-2026-53855?: OpenClaw before 2026.4.2 contains an inline-eval bypass vulnerability allowing authenticated operators to weaken strict allowlist checks via shell positional parameters. Attackers can combine allowlisted tools with shell positional arguments to place inline-eval content in shell carriers outside intended allowlist rules, enabling execution of unapproved shell-provided content.
How severe is CVE-2026-53855?: CVE-2026-53855 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-2026-53855 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-53855?: CVE-2026-53855 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-53855?: 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-2026-53855 have an EU (EUVD) identifier?: Yes. CVE-2026-53855 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37157.
When was CVE-2026-53855 published?: CVE-2026-53855 was published on 2026-06-16 and last updated on 2026-06-18.

References

Affected products (1)

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

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