MAL-2026-17432

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/brioche-apl-dev-env/MAL-2026-17432.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17432
Published
2026-09-30T07:11:22Z
Modified
2026-10-04T23:30:06Z
Summary
Malicious code in brioche-apl-dev-env (npm)
Details

brioche-apl-dev-env is a dependency-confusion package: it takes a name that looks like an internal project, uses an inflated version (100.0.0) so it outranks private-registry versions, and runs node setup.js || true as a preinstall script on npm install. setup.js sends the hostname, username, working directory, OS, architecture, Node.js version and configured npm registry, with a per-package tracking token, in an HTTPS POST to https://s85r5k14qk.execute-api.us-east-1.amazonaws.com/prod/hook. The npm account amel10 published brioche-apl-dev-env and 9 similar packages within two minutes on 2026-09-30, all with the same setup.js.

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

Source: amazon-inspector (637c99e6cd2bd8e143f01f5f522a7497375a24072fca131057cfd40ae0bb0d3e)

The package declares a preinstall script that runs setup.js during npm install. That script collects installer host identifiers (hostname, OS username, current working directory, platform/arch, Node.js version, configured npm registry) together with a static per-package token, serializes them as JSON, and POSTs them to a hardcoded endpoint at https://s85r5k14qk.execute-api.us-east-1.amazonaws.com/prod/hook. The package is presented as a small utility (vowel-counting) but its only install-time effect is this outbound beacon to an author-controlled AWS API Gateway URL. The version number (100.0.0) and package naming are consistent with a dependency-confusion lure targeting an internal brioche-apl-* namespace, and the transmitted fields (internal hostname, username, cwd, configured registry) are exactly the reconnaissance data used to identify successfully hijacked internal builds.

Database specific 
{
    "iocs":  {
        "domains":  [
            "s85r5k14qk.execute-api.us-east-1.amazonaws.com"
        ],
        "files":  [
            {
                "digests":  {
                    "sha256":  "425187cdaf8ac341e684f3885592d24dbd7f3a74bfdf051910fbb29590992627"
                },
                "note":  "preinstall: node setup.js || true",
                "paths":  [
                    "package.json"
                ],
                "source":  "PACKAGE_ARCHIVE"
            },
            {
                "digests":  {
                    "sha256":  "2b68db643189196da35e2b3d16d9e05a3a2df600bc286421932300417c5f0758"
                },
                "note":  "Executed by the preinstall script.",
                "paths":  [
                    "setup.js"
                ],
                "source":  "PACKAGE_ARCHIVE"
            }
        ],
        "urls":  [
            "https://s85r5k14qk.execute-api.us-east-1.amazonaws.com/prod/hook"
        ]
    },
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020897",
            "import_time":  "2026-10-04T23:16:31.09421692Z",
            "modified_time":  "2026-10-04T23:16:11Z",
            "sha256":  "637c99e6cd2bd8e143f01f5f522a7497375a24072fca131057cfd40ae0bb0d3e",
            "source":  "amazon-inspector",
            "versions":  [
                "100.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / brioche-apl-dev-env

Package

Name
brioche-apl-dev-env
View open source insights on deps.dev
Purl
pkg:npm/brioche-apl-dev-env

Affected ranges

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

Affected versions

100.*
100.0.0

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"
    }
]
indicators 
{
    "evidence_files":  [
        {
            "path":  "setup.js",
            "sha256":  "2b68db643189196da35e2b3d16d9e05a3a2df600bc286421932300417c5f0758",
            "tlsh":  "e001f4f496e5e5b53abc51c4f15078479277d114340775e0c9e481557f89af80d728f2"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "brioche-apl-dev-env-100.0.0.tgz",
            "hashes":  {
                "sha1":  "c3057290d69637592bf60603d71cf7cd1e86225b",
                "sha512_sri":  "sha512-dMJJnTe0YAtB2YW7etFOJGbTgAKAwzS2fjZwrCbzGg+mJuvaQaWk90q+AxlEJbvqHgjE9ICsaYLPEAd4V7BhaA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/brioche-apl-dev-env/MAL-2026-17432.json"