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Vulnerabilities

Vulnerability · MAL-2026-17883

Malicious code in py-worm (PyPI)

Published Oct 15, 2026 · catalog updated Oct 16, 2026 · Malicious code in py-worm

Open the advisory

Exploitation likelihood is not on this record for MAL-2026-17883. A missing EPSS score is not a low risk. Compare Malicious code in py-worm with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Malicious code in py-worm).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
PyPI py-worm

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • PyPI py-worm0.1.0, 2.0.0, 2.0.1

How to fix MAL-2026-17883

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for MAL-2026-17883. A missing EPSS score is not a low risk. Compare Malicious code in py-worm with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0.1.0, 2.0.0, 2.0.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

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

Sources

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.