CVE-2026-53851

MEDIUM 5.3

OpenClaw < 2026.5.12 - Slack Reaction Event Notification Bypass

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-862
Vendor	openclaw
Product	openclaw
Published	Jun 16, 2026
Last Updated	Jun 16, 2026

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CVSS v3 Breakdown

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 Versions

OpenClaw / OpenClaw

0 < 2026.5.12

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/openclaw/openclaw/security/advisories/GHSA-fcvx-5cxc-v5p8 vulncheck.com: https://www.vulncheck.com/advisories/openclaw-slack-reaction-event-notification-bypass

Credits

🔍 Edward-x (@YLChen-007)