MAL-2026-18118

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/semer/MAL-2026-18118.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-18118

Published

2026-10-20T23:02:04Z

Modified

2026-10-22T23:45:03Z

Summary

Malicious code in semer (PyPI)

Details

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

Source: kam193 (7479f42de6f963e39b7aa1409b586e605dca69978763ab35236d20c9126aa4f1)

During installation, package downloads and executes malware.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-10-semvver

Reasons (based on the campaign):

Downloads and executes a remote executable.
malware
typosquatting

Database specific

{
    "iocs":  {
        "domains":  [
            "c2-worker.crawlnet-claim.workers.dev"
        ],
        "urls":  [
            "https://c2-worker.crawlnet-claim.workers.dev/dl/pyupd"
        ]
    },
    "malicious-packages-origins":  [
        {
            "id":  "pypi/2026-10-semvver/semer",
            "import_time":  "2026-10-20T23:38:02.547920843Z",
            "modified_time":  "2026-10-20T23:02:04.089029Z",
            "sha256":  "7479f42de6f963e39b7aa1409b586e605dca69978763ab35236d20c9126aa4f1",
            "source":  "kam193",
            "versions":  [
                "1.0.0"
            ]
        },
        {
            "id":  "pypi/2026-10-semvver/semer",
            "import_time":  "2026-10-22T23:38:53.987882051Z",
            "modified_time":  "2026-10-20T23:02:04.089029Z",
            "sha256":  "77a83c900954eea717ed30c2ec5f6e51b1b0b4a9591409845af5eadce09f4dfb",
            "source":  "kam193",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}

References

Credits

- Kamil Mańkowski (kam193) - REPORTER
- - https://github.com/kam193
  - https://bad-packages.kam193.eu/

Affected packages

PyPI / semer

Package

Name: semer; View open source insights on deps.dev
Purl: pkg:pypi/semer

Affected ranges

Affected versions

1.*

1.0.0

Database specific

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/semer/MAL-2026-18118.json"