High severity7.1NVD Advisory· Published Jun 16, 2026· Updated Jun 17, 2026
CVE-2026-53840
CVE-2026-53840
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
openclawnpm | < 2026.5.12 | 2026.5.12 |
Affected products
12<2026.5.12+ 10 more
- (no CPE)range: <2026.5.12
- cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*range: <2026.5.12
- cpe:2.3:a:openclaw:openclaw:2026.5.12:beta1:*:*:*:node.js:*:*
- cpe:2.3:a:openclaw:openclaw:2026.5.12:beta2:*:*:*:node.js:*:*
- cpe:2.3:a:openclaw:openclaw:2026.5.12:beta3:*:*:*:node.js:*:*
- cpe:2.3:a:openclaw:openclaw:2026.5.12:beta4:*:*:*:node.js:*:*
- cpe:2.3:a:openclaw:openclaw:2026.5.12:beta5:*:*:*:node.js:*:*
- cpe:2.3:a:openclaw:openclaw:2026.5.12:beta6:*:*:*:node.js:*:*
- cpe:2.3:a:openclaw:openclaw:2026.5.12:beta7:*:*:*:node.js:*:*
- cpe:2.3:a:openclaw:openclaw:2026.5.12:beta8:*:*:*:node.js:*:*
- (no CPE)range: < 2026.5.12
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-rjxq-qqhf-8hwhghsaADVISORY
- github.com/openclaw/openclaw/security/advisories/GHSA-rjxq-qqhf-8hwhnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-53840ghsaADVISORY
- www.vulncheck.com/advisories/openclaw-custom-header-leakage-via-mcp-streamable-http-cross-origin-redirectsnvdThird Party AdvisoryWEB
News mentions
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