CVE-2026-53851

MediumCVSS 5.3/10Last modified Oct 25, 2026

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness enumeration

CWE-862

Affected software

Vendor	Product	Versions
OpenClaw	OpenClaw	< 2026.5.12

References

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

Timeline

Published: Jun 16, 2026
Last modified: Oct 25, 2026
NVD status: Analyzed

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