How severe is CVE-2026-42423?

CVE-2026-42423 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-42423 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42423?

CVE-2026-42423 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42423?

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-2026-42423 have an EU (EUVD) identifier?

Yes. CVE-2026-42423 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26126.

When was CVE-2026-42423 published?

CVE-2026-42423 was published on 2026-04-28 and last updated on 2026-06-17.

CVE-2026-42423

CVE-2026-42423 is a high-severity vulnerability in Openclaw with a CVSS 3.x base score of 7.5. 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-636.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 7.7
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26126
Weakness: CWE-636
Affected product: Openclaw
Published: 2026-04-28
Last modified: 2026-06-17

Description

OpenClaw before 2026.4.8 contains an approval-timeout fallback mechanism that bypasses strictInlineEval explicit-approval requirements on gateway and node exec hosts. Attackers can exploit this timeout fallback to execute inline eval commands that should require explicit user approval, circumventing the intended security boundary.

Frequently asked questions

What is CVE-2026-42423?: OpenClaw before 2026.4.8 contains an approval-timeout fallback mechanism that bypasses strictInlineEval explicit-approval requirements on gateway and node exec hosts. Attackers can exploit this timeout fallback to execute inline eval commands that should require explicit user approval, circumventing the intended security boundary.
How severe is CVE-2026-42423?: CVE-2026-42423 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-42423 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42423?: CVE-2026-42423 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42423?: 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-2026-42423 have an EU (EUVD) identifier?: Yes. CVE-2026-42423 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26126.
When was CVE-2026-42423 published?: CVE-2026-42423 was published on 2026-04-28 and last updated on 2026-06-17.

References

Affected products (1)

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

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