CVE-2026-41299

OpenClaw < 2026.3.28 - Client Identity Spoofing in chat.send Gateway Provenance Guard

State: Published
Severity: 7.1 High
Published: Apr 20, 2026
Updated: Apr 21, 2026
Reserved: Apr 20, 2026

Description

OpenClaw before 2026.3.28 contains an authorization bypass vulnerability in the chat.send gateway method where ACP-only provenance fields are gated by self-declared client metadata from WebSocket handshake rather than verified authorization state. Authenticated operator clients can spoof ACP identity labels and inject reserved provenance fields intended only for the ACP bridge by manipulating client metadata during connection.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N	VulnCheck
3.1	7.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N	VulnCheck

Weaknesses

CWE-807 Reliance on Untrusted Inputs in a Security Decision

Affected Products

Product	Versions
OpenClawOpenClaw	before 2026.3.28Affected 2026.3.28Not affected

References

GitHub Security Advisory (GHSA-6xg4-82hv-cp6f)vendor-advisory
VulnCheck Advisory: OpenClaw < 2026.3.28 - Client Identity Spoofing in chat.send Gateway Provenance Guardthird-party-advisory

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