CVE-2026-53851 — MEDIUM (5.3)

Q: How severe is CVE-2026-53851?

CVE-2026-53851 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-53851?

Check the references section above for vendor advisories and patch information. Affected products include: Openclaw Openclaw.

Vulnerability 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.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Openclaw	Openclaw	< 2026.5.12

Related Weaknesses (CWE)

CWE-862

References

https://github.com/openclaw/openclaw/security/advisories/GHSA-fcvx-5cxc-v5p8Vendor Advisory
https://www.vulncheck.com/advisories/openclaw-slack-reaction-event-notification-Third Party Advisory

FAQ

What is CVE-2026-53851?

CVE-2026-53851 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 uninten...

How severe is CVE-2026-53851?

CVE-2026-53851 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-53851?

Check the references section above for vendor advisories and patch information. Affected products include: Openclaw Openclaw.