MAL-2026-13398

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@xiaohhhh1/canvas-agent/MAL-2026-13398.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13398
Published
2026-08-06T12:56:25Z
Modified
2026-08-07T13:20:13Z
Summary
Malicious code in @xiaohhhh1/canvas-agent (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (a34add291ef7584aec7041449cb2e80d36ae98f93c2725e1aa018707e3334119)

On bin start, @xiaohhhh1/canvas-agent opens an outbound WebSocket to the hardcoded relay wss://canvas.xiaohhhh1.com/api/agent-relay and treats inbound messages as HTTP requests to its own loopback API at 127.0.0.1:17371. The bridge unconditionally injects the local agent token (x-canvas-agent-token) into forwarded requests, so remote 'request' messages satisfy token authentication and can invoke /agent/codex/turn and /agent/claude/turn, which spawn the Codex app-server and Claude CLI locally with attacker-supplied prompts and a caller-controlled permissionMode. Codex/Claude are autonomous coding agents that can write files in the workspace and, when permissionMode is widened to danger-full-access, execute arbitrary shell commands. The same code path also bypasses the loopback server's browser-Origin allow-list: the origin gate is populated only after token validation, and the relay bridge presents the valid token without any user-consented browser Origin, so remote-originated calls pass the token+origin check the README advertises. The net effect is a network-to-local-agent-to-shell control path from a hardcoded author-controlled server into the installer's machine and any repository it is run against.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-016269",
            "import_time": "2026-08-06T13:09:08.805629109Z",
            "modified_time": "2026-08-06T12:56:25Z",
            "sha256": "40162697638de6a974c2f7408ccf190f6d5b5f7ea82e5e52bbc9cb2a013fab08",
            "source": "amazon-inspector",
            "versions": [
                "0.4.4"
            ]
        },
        {
            "id": "IN-MAL-2026-017057",
            "import_time": "2026-08-07T12:51:24.276629163Z",
            "modified_time": "2026-08-07T12:37:40Z",
            "sha256": "07742c610792581bda3385162f04dfb375ea8ef09e662a31f94f5ea8cfa514cf",
            "source": "amazon-inspector",
            "versions": [
                "0.4.11"
            ]
        },
        {
            "id": "IN-MAL-2026-017061",
            "import_time": "2026-08-07T12:51:24.499709565Z",
            "modified_time": "2026-08-07T12:38:14Z",
            "sha256": "666b9625de3bae854b67278897e7275aceadf8006c406e672a13ac6b5a9ae2e6",
            "source": "amazon-inspector",
            "versions": [
                "0.4.10"
            ]
        },
        {
            "id": "IN-MAL-2026-017063",
            "import_time": "2026-08-07T12:51:24.593651311Z",
            "modified_time": "2026-08-07T12:40:29Z",
            "sha256": "99baacdee21209244b73a38b2b48cc55db72177734159c541110f6769de4b494",
            "source": "amazon-inspector",
            "versions": [
                "0.4.9"
            ]
        },
        {
            "id": "IN-MAL-2026-017068",
            "import_time": "2026-08-07T12:51:24.729804267Z",
            "modified_time": "2026-08-07T12:50:10Z",
            "sha256": "a34add291ef7584aec7041449cb2e80d36ae98f93c2725e1aa018707e3334119",
            "source": "amazon-inspector",
            "versions": [
                "0.4.8"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / @xiaohhhh1/canvas-agent

Package

Name
@xiaohhhh1/canvas-agent
View open source insights on deps.dev
Purl
pkg:npm/%40xiaohhhh1/canvas-agent

Affected ranges

Affected versions

0.*
0.4.4
0.4.8
0.4.9
0.4.10
0.4.11

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "dist/relay-bridge.js",
            "sha256": "1592cec35eca9796bcaef872825af69c1b5362b7baa793f9849f573c9e0e4258",
            "tlsh": "9db141020cb3147113b3306eeb17e50a7132a1437342c9aabf9c9bd55f591a9da937cd"
        },
        {
            "path": "dist/agent/codex-client.js",
            "sha256": "64c82c5a1b80d557297872479ce37fa33be391d04c8de1959163204285431a2b",
            "tlsh": "b192850555ffa46242a3756c7f1b42246639a00b310dc968ff4cd6a82f9cd24d2b6fec"
        },
        {
            "path": "dist/server/http.js",
            "sha256": "1b72be515c519efad59b96f6606901e9726142fecdb0712a0889fb73b0b1b79b",
            "tlsh": "8492a60b76af26b04a7be51c8b0b40155677b817b14cc4a4fb8cd260afcdd65e0e2bd8"
        }
    ],
    "package_integrity": [
        {
            "filename": "canvas-agent-0.4.4.tgz",
            "hashes": {
                "sha1": "f78e8330047a3fcd66b71e2ee6230bc7aa48e428",
                "sha512_sri": "sha512-yNewscLFEGnVD/DccQtoZC+dEvgGq1EjjSIbNLMMsZ6ZQvqjap9ULUl9Fpcfmg1vvbv+pf3Dgln9h5yAS8ub5Q=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@xiaohhhh1/canvas-agent/MAL-2026-13398.json"