How severe is CVE-2026-53857?

CVE-2026-53857 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-2026-53857 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-53857?

CVE-2026-53857 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-53857?

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-2026-53857 have an EU (EUVD) identifier?

Yes. CVE-2026-53857 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37159.

When was CVE-2026-53857 published?

CVE-2026-53857 was published on 2026-06-16 and last updated on 2026-06-18.

CVE-2026-53857

CVE-2026-53857 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-290.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v4: 8.6
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37159
Weakness: CWE-290
Affected product: Openclaw
Published: 2026-06-16
Last modified: 2026-06-18

Description

OpenClaw before 2026.5.3 contains a policy enforcement vulnerability where Zalo contacts with mutable display metadata could match allowFrom policy entries through display name changes. Attackers with mutable display names could receive agent responses intended for different Zalo identities when the feature is enabled.

Frequently asked questions

What is CVE-2026-53857?: OpenClaw before 2026.5.3 contains a policy enforcement vulnerability where Zalo contacts with mutable display metadata could match allowFrom policy entries through display name changes. Attackers with mutable display names could receive agent responses intended for different Zalo identities when the feature is enabled.
How severe is CVE-2026-53857?: CVE-2026-53857 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-2026-53857 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-53857?: CVE-2026-53857 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-53857?: 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-2026-53857 have an EU (EUVD) identifier?: Yes. CVE-2026-53857 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37159.
When was CVE-2026-53857 published?: CVE-2026-53857 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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