How severe is CVE-2026-43534?

CVE-2026-43534 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-43534 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-2026-43534?

CVE-2026-43534 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-43534?

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

Does CVE-2026-43534 have an EU (EUVD) identifier?

Yes. CVE-2026-43534 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27279.

When was CVE-2026-43534 published?

CVE-2026-43534 was published on 2026-05-05 and last updated on 2026-06-17.

CVE-2026-43534

CVE-2026-43534 is a critical-severity vulnerability in Openclaw with a CVSS 3.x base score of 9.1. 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-345.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 9.3
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-27279
Weakness: CWE-345
Affected product: Openclaw
Published: 2026-05-05
Last modified: 2026-06-17

Description

OpenClaw before 2026.4.10 contains an input validation vulnerability that allows external hook metadata to be enqueued as trusted system events. Attackers can supply malicious hook names to escalate untrusted input into higher-trust agent context.

Frequently asked questions

What is CVE-2026-43534?: OpenClaw before 2026.4.10 contains an input validation vulnerability that allows external hook metadata to be enqueued as trusted system events. Attackers can supply malicious hook names to escalate untrusted input into higher-trust agent context.
How severe is CVE-2026-43534?: CVE-2026-43534 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-43534 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-2026-43534?: CVE-2026-43534 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-43534?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-43534 have an EU (EUVD) identifier?: Yes. CVE-2026-43534 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27279.
When was CVE-2026-43534 published?: CVE-2026-43534 was published on 2026-05-05 and last updated on 2026-06-17.

References

Affected products (1)

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

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