---
id: MAL-2026-18118
title: Malicious code in semer (PyPI)
summary: Malicious code in semer (PyPI)
severity: critical
exploited: true
vendor: semer
product: semer
ecosystem: pip
affected:
  - semer
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T23:45:07.189461093Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/MAL-2026-18118'
references:
  - url: >-
      https://www.virustotal.com/gui/file/e6d96b5500b232bea67f6f9046cfbc22d29a515c42d2af9523a15ebe8a7c4ab7/
  - url: 'https://bad-packages.kam193.eu/pypi/package/semer'
tags:
  - osv
  - pip
  - malware
ingestedAt: '2026-10-21T11:54:42.745Z'
---

## Overview


---
_-= 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


## Affected packages

- `semer`

## Remediation

Refer to the advisory for the patched release.