MAL-2026-5483

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/mcp-server-sentry/MAL-2026-5483.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-5483
Aliases
  • GHSA-m5mm-f722-7vcq
Published
2026-06-09T20:33:56Z
Modified
2026-08-20T15:30:12Z
Summary
Malicious code in mcp-server-sentry (npm)
Details

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

Source: amazon-inspector (cf12283b2f16a43388d0cc6c2991fbbdab0da44ab344c1f9c71515dd05024046)

On npm install, the package's postinstall hook (scripts.postinstall: node index.js) collects host identifiers — os.hostname(), process.cwd(), the npm user-agent, Node version, and os.platform()/arch — and POSTs them to a hardcoded remote endpoint at https://npx-canary-log.vulnerable-live.workers.dev/log without any installer consent or opt-out. The package name mcp-server-sentry is an unscoped squat targeting the MCP/Sentry naming convention used by AI coding agents and developer tooling that invoke npx mcp-server-sentry expecting an official MCP server; the README confirms the package was published to capture traffic resolving this unclaimed name. The combination of an intentional name-squat plus install-time outbound transmission of installer identifiers (hostname + working-directory paths, which routinely leak usernames and project layouts) to an author-controlled Cloudflare Workers endpoint is a supply-chain exfiltration shape, regardless of the author's stated 'research canary' intent — installers receive no disclosure and no opportunity to decline before the beacon fires.

Source: ghsa-malware (5e84d7710bc837fa5b695279d01be458fd074c31f5f8a5d39d7d0e7901544f10)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-005222",
            "import_time": "2026-06-09T20:45:56.271164213Z",
            "modified_time": "2026-06-09T20:33:56Z",
            "sha256": "8958cba33d604713291f4f6c0a036afbf1e87ad5a4f07208e65b8b6c0c8925cd",
            "source": "amazon-inspector",
            "versions": [
                "0.0.1"
            ]
        },
        {
            "id": "IN-MAL-2026-005221",
            "import_time": "2026-06-09T20:45:56.113242468Z",
            "modified_time": "2026-06-09T20:33:56Z",
            "sha256": "cf12283b2f16a43388d0cc6c2991fbbdab0da44ab344c1f9c71515dd05024046",
            "source": "amazon-inspector",
            "versions": [
                "0.0.1"
            ]
        },
        {
            "id": "IN-MAL-2026-006069",
            "import_time": "2026-06-12T19:44:04.390139565Z",
            "modified_time": "2026-06-12T19:08:05Z",
            "sha256": "425687b3f3b3b2b66b87fc41473eeb1b8cc1ad435d9d3c8f9ba04e9bd4bd2900",
            "source": "amazon-inspector",
            "versions": [
                "0.0.2"
            ]
        },
        {
            "id": "IN-MAL-2026-006070",
            "import_time": "2026-06-12T19:44:04.475922458Z",
            "modified_time": "2026-06-12T19:08:06Z",
            "sha256": "d60e168b4e5a5d37ecf2e06734c5eea1440ebc8a224e6789b4b5b635e160cff2",
            "source": "amazon-inspector",
            "versions": [
                "0.0.2"
            ]
        },
        {
            "id": "GHSA-m5mm-f722-7vcq",
            "import_time": "2026-08-20T15:26:15.535286538Z",
            "modified_time": "2026-08-20T14:25:57Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "5e84d7710bc837fa5b695279d01be458fd074c31f5f8a5d39d7d0e7901544f10",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / mcp-server-sentry

Package

Name
mcp-server-sentry
View open source insights on deps.dev
Purl
pkg:npm/mcp-server-sentry

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.0.1
0.0.2

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"
    }
]
indicators 
{
    "domains": [
        "npx-canary-log.vulnerable-live.workers.dev"
    ],
    "evidence_files": [
        {
            "path": "index.js",
            "sha256": "36cd93aa9a8ac8a0b6d64e4ef03aa5c3efd6d9f6f0b7434392475f8a2fed6877",
            "tlsh": "f33195e180f805351bee46d3e1e9a899a36ff1263a0678f4b45e02295fcd49807b1cd2"
        },
        {
            "path": "README.md",
            "sha256": "c276523e95d9666c73752d3ec82def504a1429a6909eec82daa1b1927e464c84",
            "tlsh": "9021717393d1733a03d24a363944b6626b3e70b5734210a8f69d060eeb4282a83b30d6"
        }
    ],
    "package_integrity": [
        {
            "filename": "mcp-server-sentry-0.0.1.tgz",
            "hashes": {
                "sha1": "bb35a4f090eb1ef8833d9a90bafefeec099dd6b3",
                "sha512_sri": "sha512-2lKbHqncUy77jU2CDqWm5GhYi+/KNDO/DlFcE14v6nRPKbfV+oKXd9NTGIoZqsERKNrVhn3+D6ZBmBMas1s6Jg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/mcp-server-sentry/MAL-2026-5483.json"