| Component | OpenClaw |
| Severity | medium (CVSS 5.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| Published (NVD) | 2026-06-16 |
| Last modified | 2026-06-17 |
| Affected versions | openclaw < 2026.5.12 openclaw = 2026.5.12 openclaw = 2026.5.12 openclaw = 2026.5.12 openclaw = 2026.5.12 openclaw = 2026.5.12 |
| Fixed in | 2026.5.12 |
| Weakness | CWE-862 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade OpenClaw to
2026.5.12or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-53851
- https://github.com/openclaw/openclaw/security/advisories/GHSA-fcvx-5cxc-v5p8
- https://www.vulncheck.com/advisories/openclaw-slack-reaction-event-notification-bypass
Read more
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