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Findings

MAL-2026-17883

Malicious code in py-worm (PyPI)

Published Oct 15, 2026 · corrected/updated Oct 16, 2026 · evidence confidence medium

Importing py-worm's module downloads a mutable Python file from to a temporary file and launches it without a visible console on Windows. Versions 0.1.0 and 2.0.0 do this directly during import; version 2.0.1 starts a daemon thread during import to perform the same action. The package's CLI and GUI entry points import this module. The remote file's Git history contains a Windows remote file management client that registers persistence through an HKCU Run entry, polls for commands, and supports file upload, download, deletion, and command execution. An earlier remote-file revision is byte-identical to the payload reported in MAL-2026-17752 ( ); the 39,931-byte is also byte-identical across that package and all py-worm releases. The remote file is mutable; its contents at the time of any particular victim import and actual execution on victim systems have not been established. --- _-= Per source details. Do not edit below this line.=-_ ## Source: kam193 (d4c5838f30da7c1f684305ec0704ef37e963793449390f5b13a4e06212ccbd9d) The package installs a persistent job that allows the attacker for exfiltrating files and executing remote code on the victim's machine. --- Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-10-agentaix Reasons (based on the campaign): - files-exfiltration - peristence-autorun - The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine. - rat - persistence - Downloads and executes a remote malicious script.

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

MAL-2026-17883 is a unknown public vulnerability record for this product. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether this product is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: py-worm (0.1.0, 2.0.0, 2.0.1). Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: no CVSS/EPSS yet. It is not currently listed in the CISA Known Exploited catalog. Sources contributing to this record: osv, pypa. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.

  • Patch and remediation

    No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    --- _-= Per source details. Do not edit below this line.=-_ ## Source: kam193 (d4c5838f30da7c1f684305ec0704ef37e963793449390f5b13a4e06212ccbd9d) The package installs a persistent job that allows the attacker for exfiltrating files and executing remote code on the victim's machine. --- Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-10-agentaix Rea

  2. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    --- _-= Per source details. Do not edit below this line.=-_ ## Source: kam193 (d4c5838f30da7c1f684305ec0704ef37e963793449390f5b13a4e06212ccbd9d) The package installs a persistent job that allows the attacker for exfiltrating files and executing remote code on the victim's machine. --- Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-10-agentaix Rea

  3. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    Importing py-worm's module downloads a mutable Python file from to a temporary file and launches it without a visible console on Windows. Versions 0.1.0 and 2.0.0 do this directly during import; version 2.0.1 starts a daemon thread during import to perform the same action. The package's CLI and GUI entry points import this module. The remote file's Git history contains a Windows remote file manage

Affected

  • PyPI py-worm0.1.0, 2.0.0, 2.0.1

Sources

References