| 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:N/A:L |
| Published (NVD) | 2026-04-10 |
| Last modified | 2026-06-17 |
| Affected versions | openclaw < 2026.3.24 |
| Fixed in | 2026.3.24 |
| Weakness | CWE-405 |
| CISA KEV | not listed |
NVD description
OpenClaw before 2026.3.24 contains an incomplete fix for CVE-2026-32011 where the Feishu webhook handler accepts request bodies with permissive limits of 1MB and 30-second timeout before signature verification. An unauthenticated attacker can exhaust server connection resources by sending concurrent slow HTTP POST requests to the Feishu webhook endpoint, blocking legitimate webhook deliveries.
What to do
- Upgrade OpenClaw to
2026.3.24or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-35665
- https://github.com/openclaw/openclaw/security/advisories/GHSA-w6m8-cqvj-pg5v
- https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-feishu-webhook-pre-auth-body-parsing
Read more
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