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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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53851 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53851

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-53851 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53851

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.