| Component | OpenClaw |
| Severity | high (CVSS 7.1) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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-522 |
| CISA KEV | not listed |
NVD description
OpenClaw before 2026.5.12 contains an information disclosure vulnerability in streamable-http MCP servers that forwards operator-configured custom headers during cross-origin redirects. Attackers controlling or compromising an MCP endpoint can redirect requests to exfiltrate sensitive headers like API keys or tenant-routing credentials to attacker-controlled origins.
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-2026-53840
- https://github.com/openclaw/openclaw/security/advisories/GHSA-rjxq-qqhf-8hwh
- https://www.vulncheck.com/advisories/openclaw-custom-header-leakage-via-mcp-streamable-http-cross-origin-redirects
Read more
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