CVE-2026-102503

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-102503
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102503.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-102503
Aliases
  • GHSA-r6hp-67wp-c7jx
Published
2026-10-19T02:20:35Z
Modified
2026-10-20T02:44:37Z
Severity
  • 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Missing Authentication on /libp2p-http Ingress in Google OSS Agent Mesh (SAM)
Details

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.

Database specific 
{
    "cna_assigner":  "Google",
    "cwe_ids":  [
        "CWE-306",
        "CWE-862"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102503.json"
}
References

Affected packages

Git / github.com/google/agentmesh

Affected ranges

Type
GIT
Repo
https://github.com/google/agentmesh
Events
Introduced
ffc3e6072383ea6e9cf3fbadc7cf473db448b364
Fixed
866ff9bfd056f8f76ba22c9b45394aef6ce148a1
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0.1.0-alpha.1"
        },
        {
            "fixed":  "0.1.0-alpha.3"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102503.json"