CVE-2026-53840

HighCVSS 7.1/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.1/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Weakness enumeration

CWE-522

Affected software

VendorProductVersions
OpenClawOpenClaw< 2026.5.12

References

Timeline

Published
Jun 16, 2026
Last modified
Jun 17, 2026
NVD status
Analyzed

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