Ruby gem: credential-stealing worm

Ruby

A malicious Ruby gem steals credentials and poisons AI tools during installation.

Do this now

Check the vendor's advisory for a fix and restrict access to the affected Ruby gem meanwhile, then rotate any credentials that may have been exposed.

Who should check: teams running Ruby / Rails

First seen: 6 Nov 2026
Last update: 6 Nov 2026, 19:18 UTC
Source: news
On the menu as: Ruby / Rails

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Ruby gem: credential-stealing worm
Severity: unknown. Patch status: fix status unknown.
Affected: Ruby

A malicious Ruby gem steals credentials and poisons AI tools during installation.

## Steps
1. Search the repo, its CI and infra config for Ruby. If present, report the version in use and whether it's affected.
2. No source names a fix yet; check the vendor advisory. Until one ships: restrict network access to it.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://socket.dev/blog/shai-hulud-descendant-malicious-ruby-gem?utm_medium=feed
https://pwned.coffee/i/ruby-gem-credential-stealing-worm

Receipt

Exploitation: No known exploitation
Score: No CVSS published yet: severity unknown.
Last checked: 7 Nov 2026, 18:18 UTC

Sources: KEV – CVE record – Vendor –

Sources

socket.dev: Shai-Hulud Descendant Surfaces in Malicious Ruby Gem That Steals Credentials and Poisons AI Tools

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