| Component | OpenClaw |
| Severity | medium (CVSS 6.5) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| Published (NVD) | 2026-06-12 |
| Last modified | 2026-10-08 |
| Affected versions | openclaw < 2026.5.7 |
| Fixed in | 2026.5.7 |
| Weakness | CWE-1023 |
| CISA KEV | not listed |
NVD description
OpenClaw before 2026.5.7 contains a hostname validation vulnerability in retry endpoint checks that allows matching hostname prefixes instead of exact hostnames. Attackers can exploit this by crafting a hostname prefix resembling a trusted host to send authentication material to untrusted endpoints.
What to do
- Upgrade OpenClaw to
2026.5.7or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-53839
- https://github.com/openclaw/openclaw/security/advisories/GHSA-77q5-rr5v-x43q
- https://www.vulncheck.com/advisories/openclaw-hostname-prefix-matching-bypass-in-trusted-retry-endpoint-validation
Read more
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