| 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) | 2026-09-26 |
| Last modified | 2026-10-05 |
| Affected versions | < 2026.8.2 read from the advisory text: NVD has not published CPE data yet |
| Fixed in | 2026.8.2 |
| Weakness | CWE-400 |
| CISA KEV | not listed |
NVD description
OpenClaw before 2026.8.2 contains a denial of service vulnerability in the Browser extension relay that allows unauthenticated network sources to exhaust pending-authentication capacity. Attackers can hold every pending slot by maintaining silent WebSocket upgrades, preventing paired extensions from completing Browser Relay Authentication v2.
What to do
- Upgrade OpenClaw to
2026.8.2or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-100527
- https://github.com/openclaw/openclaw/security/advisories/GHSA-m78m-7h3q-q938
- https://www.vulncheck.com/advisories/openclaw-before-2026.8.2-denial-of-service-via-browser-relay
Read more
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