How severe is CVE-2026-53851?

CVE-2026-53851 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-53851 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-2026-53851?

CVE-2026-53851 primarily affects Openclaw. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-53851?

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

Does CVE-2026-53851 have an EU (EUVD) identifier?

Yes. CVE-2026-53851 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37153.

When was CVE-2026-53851 published?

CVE-2026-53851 was published on 2026-06-16 and last updated on 2026-06-17.

CVE-2026-53851

CVE-2026-53851 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-862.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.3
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37153
Weakness: CWE-862
Affected product: Openclaw
Published: 2026-06-16
Last modified: 2026-06-17

Description

OpenClaw before 2026.5.12 contains a notification bypass vulnerability allowing Slack reaction events to enter the agent pipeline despite disabled reaction notifications. Attackers can trigger unintended agent processing by sending reaction events when the feature is enabled, potentially leading to unauthorized processing of lower-trust input.

Frequently asked questions

What is CVE-2026-53851?: OpenClaw before 2026.5.12 contains a notification bypass vulnerability allowing Slack reaction events to enter the agent pipeline despite disabled reaction notifications. Attackers can trigger unintended agent processing by sending reaction events when the feature is enabled, potentially leading to unauthorized processing of lower-trust input.
How severe is CVE-2026-53851?: CVE-2026-53851 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-53851 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-2026-53851?: CVE-2026-53851 primarily affects Openclaw. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-53851?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-53851 have an EU (EUVD) identifier?: Yes. CVE-2026-53851 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37153.
When was CVE-2026-53851 published?: CVE-2026-53851 was published on 2026-06-16 and last updated on 2026-06-17.

References

Affected products (9)

cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
cpe:2.3:a:openclaw:openclaw:2026.5.12:beta1:*:*:*:node.js:*:*
cpe:2.3:a:openclaw:openclaw:2026.5.12:beta2:*:*:*:node.js:*:*
cpe:2.3:a:openclaw:openclaw:2026.5.12:beta3:*:*:*:node.js:*:*
cpe:2.3:a:openclaw:openclaw:2026.5.12:beta4:*:*:*:node.js:*:*
cpe:2.3:a:openclaw:openclaw:2026.5.12:beta5:*:*:*:node.js:*:*
cpe:2.3:a:openclaw:openclaw:2026.5.12:beta6:*:*:*:node.js:*:*
cpe:2.3:a:openclaw:openclaw:2026.5.12:beta7:*:*:*:node.js:*:*
cpe:2.3:a:openclaw:openclaw:2026.5.12:beta8:*:*:*:node.js:*:*

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