Vulnerability · Published Apr 20, 2026 · Assigned by VulnCheck

CVE-2026-41299OpenClaw < 2026.3.28 - Client Identity Spoofing in chat.send Gateway Provenance Guard

High 7.1

In plain English

A high-severity security flaw in OpenClaw from OpenClaw. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.2%top 89.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	openclaw	2026.3.28	GHSA-6xg4-82hv-cp6f

Affected products (as reported)

Vendor	Product	Versions
OpenClaw	OpenClaw	0 – before 2026.3.28

Weakness: CWE-807 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

References

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