How severe is CVE-2026-42427?

CVE-2026-42427 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability none.

Is CVE-2026-42427 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42427?

CVE-2026-42427 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42427?

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

Does CVE-2026-42427 have an EU (EUVD) identifier?

Yes. CVE-2026-42427 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26129.

When was CVE-2026-42427 published?

CVE-2026-42427 was published on 2026-04-28 and last updated on 2026-06-17.

CVE-2026-42427

CVE-2026-42427 is a medium-severity vulnerability in Openclaw with a CVSS 3.x base score of 5.3. 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: Medium (CVSS 3.x base score 5.3)
CVSS v4: 5.8
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26129
Weakness: CWE-184
Affected product: Openclaw
Published: 2026-04-28
Last modified: 2026-06-17

Description

OpenClaw before 2026.4.8 contains a remote code execution vulnerability caused by missing environment variable denylist entries for HGRCPATH, CARGO_BUILD_RUSTC_WRAPPER, RUSTC_WRAPPER, and MAKEFLAGS. Attackers can inject malicious build tool environment variables to influence host exec commands and achieve arbitrary code execution.

Frequently asked questions

What is CVE-2026-42427?: OpenClaw before 2026.4.8 contains a remote code execution vulnerability caused by missing environment variable denylist entries for HGRCPATH, CARGO_BUILD_RUSTC_WRAPPER, RUSTC_WRAPPER, and MAKEFLAGS. Attackers can inject malicious build tool environment variables to influence host exec commands and achieve arbitrary code execution.
How severe is CVE-2026-42427?: CVE-2026-42427 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability none.
Is CVE-2026-42427 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42427?: CVE-2026-42427 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42427?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42427 have an EU (EUVD) identifier?: Yes. CVE-2026-42427 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26129.
When was CVE-2026-42427 published?: CVE-2026-42427 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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