CVE-2026-102503
Severity not reportedMissing Authentication for Critical Function (CWE-306) and Missing Authorization (CWE-862) in the /libp2p-http ingress server (StartIngressServer in cmd/sam-no…
Missing Authentication for Critical Function (CWE-306) and Missing Authorization (CWE-862) in the /libp2p-http ingress server (StartIngressServer in cmd/sam-node/node.go) in Google OSS Agent Mesh (SAM) versions 0.1.0-alpha.1 through 0.1.0-alpha.2 allow an unauthenticated remote libp2p peer to bypass Biscuit capability policy enforcement and invoke arbitrary registered backend services (including command/stdio-backed MCP servers, A2A, and inference endpoints). While the MCP protocol stream handler enforces WithBiscuitAuth and Authorize checks, the parallel /libp2p-http ingress routes requests directly to backend service handlers without verifying a Biscuit token or mesh enrollment. Users should upgrade to version 0.1.0-alpha.3 or later.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/google/sam/commit/433bc99d2a2c10071167bf22acc2c930a12e64e1 cve-coordination@google.com
- https://github.com/google/sam/releases/tag/v0.1.0-alpha.3 cve-coordination@google.com
- https://github.com/google/sam/security/advisories/GHSA-r6hp-67wp-c7jx cve-coordination@google.com
- https://github.com/google/agentmesh/security/advisories/GHSA-r6hp-67wp-c7jx 134c704f-9b21-4f2e-91b3-4a467353bcc0