PatchSiren cyber security CVE debrief
CVE-2026-53851 OpenClaw CVE debrief
CVE-2026-53851 is a MEDIUM-severity vulnerability (CVSS Score: 6.3) in OpenClaw, a software that appears to be related to automation or workflow management, potentially involving Slack integration. The issue, publicly disclosed on 2026-06-16, allows attackers to bypass notification settings for Slack reaction events when the feature is enabled, potentially leading to unauthorized processing of lower-trust input.
- Vendor
- OpenClaw
- Product
- Unknown
- CVSS
- MEDIUM 6.3
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-16
- Original CVE updated
- 2026-06-17
- Advisory published
- 2026-06-16
- Advisory updated
- 2026-06-17
Who should care
Users of OpenClaw, especially those who have integrated it with Slack and have reaction notifications enabled, should be aware of this vulnerability. The MEDIUM severity suggests that while the vulnerability is significant, it may require specific conditions to be fully exploited.
Technical summary
The vulnerability exists in OpenClaw versions before 2026.5.12. It allows attackers to send Slack reaction events that can enter the agent pipeline even when reaction notifications are disabled. This could lead to unintended processing of events that are typically considered lower-trust input.
Defensive priority
MEDIUM
Recommended defensive actions
- Update OpenClaw to version 2026.5.12 or later to patch the vulnerability.
- Review and adjust Slack integration settings in OpenClaw to ensure that only trusted inputs are processed.
- Monitor OpenClaw and Slack logs for any unusual activity related to reaction events.
Evidence notes
The CVE record and associated details were obtained from official sources, including CVE.org and the National Vulnerability Database (NVD). Additional information was derived from vulnerability disclosures by Vulncheck.
Official resources
CVE-2026-53851 was publicly disclosed on 2026-06-16. The CVE record was published and modified on the same day, indicating rapid analysis and publication of the vulnerability details.