MAL-2026-17319

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/bfox-build-utils/MAL-2026-17319.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17319
Published
2026-09-30T03:04:36Z
Modified
2026-09-30T03:30:05Z
Summary
Malicious code in bfox-build-utils (PyPI)
Details

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

Source: amazon-inspector (cae53348f8261653938b39ae3cb79101baff666c4216ecaeb635e34b42ba8293)

At install time, setup.py harvests the installer's GitHub credential and uses it to modify the installer's own repository. The script reads $GITHUB_WORKSPACE/.git/config, regexes the extraheader = AUTHORIZATION: basic <b64> line that actions/checkout injects for the running job, base64-decodes it to recover the token, and also reads GITHUB_TOKEN from the environment. Using that token as x-access-token, it clones the installer's repository, creates branch feature/ci-health-check, writes .github/workflows/ci-health-check.yml, commits as github-actions[bot] with message Add CI health check, and pushes via git (with a REST-API fallback), explicitly bypassing the API restriction that protects workflow files. This plants a persistent, attacker-controlled GitHub Actions workflow in the installer's repository that will execute on future pushes to the planted branch. The shipped Python module bfox_build_utils.py is a two-line stub containing only VERSION = "1.0.997"; the package's advertised purpose (Build utilities.) and the innocuous naming of the branch, commit, and bot identity are cover for the credential theft and workflow-injection payload in setup.py.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020795",
            "import_time":  "2026-09-30T03:24:19.64476416Z",
            "modified_time":  "2026-09-30T03:04:36Z",
            "sha256":  "cae53348f8261653938b39ae3cb79101baff666c4216ecaeb635e34b42ba8293",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.997"
            ]
        }
    ]
}
References
Credits

Affected packages

PyPI / bfox-build-utils

Package

Name
bfox-build-utils
View open source insights on deps.dev
Purl
pkg:pypi/bfox-build-utils

Affected ranges

Affected versions

1.*
1.0.997

Database specific

cwes 
[
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files":  [
        {
            "path":  "setup.py",
            "sha256":  "67b03e3a2aa4c3f091dea8af0f2754bdd6948f8330eb8460ae12e19c0c8f2c80",
            "tlsh":  "8fc15496da062ca283a7cc2cd5c6c0a0a675784f56095c347eec81797fcc579c2e32dd"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "bfox_build_utils-1.0.997.tar.gz",
            "hashes":  {
                "blake2b_256":  "1d3b4905e852ca5a65902f26f3cecc7ed8f5082dae5fa01cdb4ec5b0fd903a0e",
                "md5":  "29c31bf4da6b36c708b2b133cb23e1ca",
                "sha256":  "b43d470d00faeffe486d550271e4096ab57b28b98d5af1624a8c0e39e62dbbb3"
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/bfox-build-utils/MAL-2026-17319.json"