MAL-2026-12512

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/appsignal/MAL-2026-12512.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12512
Published
2026-08-05T13:09:30Z
Modified
2026-08-05T14:35:12Z
Summary
Malicious code in appsignal (npm)
Details

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

Source: amazon-inspector (ff26e8c679b4035612af78043157ee418aac37aab4eebc5ba54a6e60f204e95c)

Package name appsignal shadows the legitimate @appsignal/* scope and is published at version 9999.0.0, a version-number pattern used to outrank private/internal dependencies during resolution. A preinstall script runs automatically on npm install and issues an HTTP GET to the hardcoded bare-IP endpoint http://75.119.137.232:31337/depconfuse, carrying the installer's os.hostname(), os.userInfo().username, process.cwd(), npm_config_registry, and CI repository-slug environment variables (GITHUB_REPOSITORY, CI_PROJECT_PATH, BUILD_REPOSITORY_NAME, BITBUCKET_REPO_FULL_NAME, TRAVIS_REPO_SLUG, DRONE_REPO, BUILDKITE_PIPELINE_SLUG, CIRCLE_PROJECT_REPONAME, JOB_NAME) as query parameters. The endpoint path /depconfuse, the bare-IP destination, the 9999.0.0 version, and the shadowing of an established scope indicate a dependency-confusion reconnaissance probe designed to identify internal build systems that resolve the public name over an intended private package.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-014905",
            "import_time":  "2026-08-05T14:19:41.699949668Z",
            "modified_time":  "2026-08-05T13:09:30Z",
            "sha256":  "ff26e8c679b4035612af78043157ee418aac37aab4eebc5ba54a6e60f204e95c",
            "source":  "amazon-inspector",
            "versions":  [
                "9999.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / appsignal

Package

Name
appsignal
View open source insights on deps.dev
Purl
pkg:npm/appsignal

Affected ranges

Affected versions

9999.*
9999.0.0

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":  "callback.js",
            "sha256":  "b754deb2c216bd803daae10124ea11ade36922f50248c8b1be8fa920c4052413",
            "tlsh":  "ea119eb9c68c0c340dc2178479686c1eb8fbe29133c294917f2d71d26bb22b046b75bd"
        },
        {
            "path":  "package.json",
            "sha256":  "9572b615b4d4c3ce120480c3f28e8ba869607a68c904df7e0f2a2b7e39f82187",
            "tlsh":  "63d0a730da2358632cd8efd30c2a554612768e3b0548784a278b901d55a967719ff79e"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "appsignal-9999.0.0.tgz",
            "hashes":  {
                "sha1":  "f49a1d79d787327c51643ee53489a19b60aa75c4",
                "sha512_sri":  "sha512-LxaYThS1LZyKSBUUPdIUvrPui8dcD5RA8V0MjvL7U59w9KzOPP911s3uP9LyB7ieTw0SnYRA+AgQZzzIwKbu5Q=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/appsignal/MAL-2026-12512.json"