---
id: "MAL-2026-18604"
kind: "package"
aliases: ["MAL-2026-18604"]
title: "Malicious code in @signals-notebook/annotation-editor (npm)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "@signals-notebook/annotation-editor", "fixed": [], "affected": "= 2.2.60-630109c", "ecosystem": "npm"}]
ecosystems: ["npm"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-11-02T09:44:21+00:00"
first_seen_at: "2026-11-04T09:25:53+00:00"
updated_at: "2026-11-04T09:28:08+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-18604", "first_seen_at": "2026-11-04T09:25:53+00:00"}]
---

# Malicious code in @signals-notebook/annotation-editor (npm)

## Affected

- npm:@signals-notebook/annotation-editor affected = 2.2.60-630109c fixed ?

## Timeline

- 2026-11-04T09:25:53+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-18604

## From the sources

Runs on install. The preinstall script sends the output of `id` (the installing user's identity and groups), base64-encoded, to a request-bin host with curl. This is the dependency-confusion probe pattern; it leaks data from every machine that installs the package. Version examined: 2.2.60-630109c; tarball SHA-256 023e55d33ea70625a746ab25627ea450718c9db722988bd233d370c1587db248.

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