How severe is CVE-2026-53837?

CVE-2026-53837 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-53837 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-2026-53837?

CVE-2026-53837 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-53837?

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

Does CVE-2026-53837 have an EU (EUVD) identifier?

Yes. CVE-2026-53837 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36625.

When was CVE-2026-53837 published?

CVE-2026-53837 was published on 2026-06-12 and last updated on 2026-06-17.

CVE-2026-53837

CVE-2026-53837 is a low-severity vulnerability in Openclaw with a CVSS 3.x base score of 3.7. 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: Low (CVSS 3.x base score 3.7)
CVSS v4: 6.3
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36625
Weakness: CWE-636
Affected product: Openclaw
Published: 2026-06-12
Last modified: 2026-06-17

Description

OpenClaw before 2026.5.6 contains an improper access control vulnerability in Mattermost event handlers that fails to validate channel type metadata. Attackers can bypass intended DM policy decisions by sending crafted Mattermost events missing channel type information to process restricted content.

Frequently asked questions

What is CVE-2026-53837?: OpenClaw before 2026.5.6 contains an improper access control vulnerability in Mattermost event handlers that fails to validate channel type metadata. Attackers can bypass intended DM policy decisions by sending crafted Mattermost events missing channel type information to process restricted content.
How severe is CVE-2026-53837?: CVE-2026-53837 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-53837 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-2026-53837?: CVE-2026-53837 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-53837?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-53837 have an EU (EUVD) identifier?: Yes. CVE-2026-53837 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36625.
When was CVE-2026-53837 published?: CVE-2026-53837 was published on 2026-06-12 and last updated on 2026-06-17.

References

Affected products (1)

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

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