| Component | OpenClaw |
| Severity | medium (CVSS 6.5) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
| Published (NVD) | 2026-03-19 |
| Last modified | 2026-06-17 |
| Affected versions | openclaw < 2026.2.25 |
| Fixed in | 2026.2.25 |
| Weakness | CWE-294 |
| CISA KEV | not listed |
NVD description
OpenClaw versions prior to 2026.2.25 lack durable replay state for Nextcloud Talk webhook events, allowing valid signed webhook requests to be replayed without suppression. Attackers can capture and replay previously valid signed webhook requests to trigger duplicate inbound message processing and cause integrity or availability issues.
What to do
- Upgrade OpenClaw to
2026.2.25or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-28449
- https://github.com/openclaw/openclaw/security/advisories/GHSA-r9q5-c7qc-p26w
- https://github.com/openclaw/openclaw/commit/d512163d686ad6741783e7119ddb3437f493dbbc
- https://www.vulncheck.com/advisories/openclaw-webhook-replay-attack-via-missing-durable-replay-suppression
Read more
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