What’s Vulnerable › Vulnerabilities

CVE-2026-32895: OpenClaw < 2026.2.26 - Sender Authorization Bypass in Slack System Event Handlers

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-21 · updated 2026-06-17
• Weakness: CWE-863

Description

OpenClaw versions prior to 2026.2.26 fail to enforce sender authorization in member and message subtype system event handlers, allowing unauthorized events to be enqueued. Attackers can bypass Slack DM allowlists and per-channel user allowlists by sending system events from non-allowlisted senders through message_changed, message_deleted, and thread_broadcast events.

Affected products

• OpenClaw: before 2026.2.26 — fixed in 2026.2.26

How to fix

Upgrade to a fixed version: OpenClaw 2026.2.26. Check the vendor advisory for mitigations.

References

• https://github.com/openclaw/openclaw/commit/3d30ba18a2aba1e1b302e77ff33145c3b06c01c8
• https://github.com/openclaw/openclaw/security/advisories/GHSA-v8cg-4474-49v8
• https://www.vulncheck.com/advisories/openclaw-sender-authorization-bypass-in-slack-system-event-handlers

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