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Supply chain security, written from the inside.

Attack post-mortems, technical deep-dives, and practical guidance for engineering teams running on-premises dependency security.

Ideas & analysis

Latest posts

8 articles

How to Block Malicious PyPI Packages Before Installation with pip, uv, and Poetry

A developer runs pip install. Another team uses uv sync. A third uses Poetry. They all pull Python dependencies, but a security rule configured in one client does not automatically apply to the others. If you want to stop a disallowed package before it reaches a developer machine or CI runner, the important question is where each client gets its packages. pip, uv, and Poetry can use a configured package index. Pointing them at a controlled PyPI proxy gives your team one place to apply package p

6 October 2026

3 min read

5 Hidden Risks in Your package.json File

A package.json file is easy to skim. You see the packages your team added, maybe a few scripts, and a version number beside each dependency. It feels like a reasonable picture of what your application installs. It is only the starting point. The versions npm actually installs are recorded in the lockfile. Those packages can bring in more packages of their own. Some can run code during installation. And a clean vulnerability report cannot tell you whether a package published this morning is saf

29 September 2026

4 min read

Trust Then Verify or Verify Then Trust? Choosing How ShieldedStack Handles the Unknown

Security policies are easy when the answer is already known. A package is explicitly approved, explicitly denied, or has a known vulnerability above the organization's accepted threshold. The harder question is what to do when a developer requests a package version that does not yet have sufficiently current assessment information. ShieldedStack gives each workspace two ways to answer that question: Trust Then Verify and Verify Then Trust. Both use the same policy controls. They differ in how

19 August 2026

5 min read

A simple architecture for securing every package

Modern software supply chains are complicated enough, CI, local developer machines, multiple environments. The system protecting them should not add more complexity than necessary. ShieldedStack's long-running application architecture is built around three clear units: the Portal, the Proxy, and the Worker. Each has one distinct purpose and is deployed separately, so capacity can be added where it is needed. That gives customers a deployment that is easy to understand on day one and straightfo

17 August 2026

4 min read

The hidden risk of license changes in open-source dependencies

Most teams think about dependency risk in terms of CVEs, malware, and typosquatting. But there is another kind of supply-chain risk that can hit just as hard: a package you already trust can change its license in a later release, turning a routine upgrade into a legal and operational problem. That is why license-change alerts matter. When a dependency moves from a permissive license to AGPL, a commercial license, or some other policy-breaking model, the right time to catch it is before the pack

15 June 2026

4 min read

A separate series

Weekly threat reports

Dependency risks and security updates, week by week.

The Weekly Dependency Threat Report: 2026-10-03

This weekly list covers the ten most significant malicious or compromised packages recently observed in public registries. 1. whalibmob (npm) * Package: https://www.npmjs.com/package/whalibmob * Severity: critical * Affected versions: 5.33.5 * Downloads: 4681 * First seen: 30 September 2026 at 10:41 UTC This package is part of a large family (100+ identified as of September 2026) of near-identical forks of the Baileys WhatsApp Web library that inject a covert channel-subscription action

5 October 2026

5 min read

The Weekly Dependency Threat Report: 2026-09-26

This weekly list covers the ten most significant malicious or compromised packages recently observed in public registries. 1. rrs (pypi) * Package: https://pypi.org/project/rrs/ * Severity: high * Affected versions: all * Downloads: 2282 * First seen: 21 September 2026 at 04:23 UTC The rrs package advertises itself as a multi-monitor screen capture CLI but, on invocation, captures every attached monitor and POSTs the resulting PNG/JPEG images to a hardcoded Discord webhook controlled by

28 September 2026

4 min read

The Weekly Dependency Threat Report: 2026-09-19

This weekly list covers the ten most significant malicious or compromised packages recently observed in public registries. 1. noblox-asset.js (npm) * Package: https://www.npmjs.com/package/noblox-asset.js * Severity: critical * Affected versions: all * Downloads: 279382 * First seen: 14 September 2026 at 18:01 UTC noblox-asset.js impersonates the noblox.js Roblox API wrapper: package.json copies the legitimate package's description, homepage (github.com/noblox/noblox.js), and repository

20 September 2026

5 min read

The Weekly Dependency Threat Report: 2026-09-12

This weekly list covers the ten most significant malicious or compromised packages recently observed in public registries. 1. tailwindcss-contact-forms (npm) * Package: https://www.npmjs.com/package/tailwindcss-contact-forms * Severity: critical * Affected versions: 0.5.6 * Downloads: 1417 * First seen: 10 September 2026 at 12:55 UTC NullReceiver The file contains heavily obfuscated code that executes shell commands via 'spawn' with '-e' and communicates with Ethereum RPC endpoints. It

15 September 2026

4 min read

The Weekly Dependency Threat Report: 2026-09-05

This weekly list covers the ten most significant malicious or compromised packages recently observed in public registries. 1. @crysnovax/baileys (npm) * Package: https://www.npmjs.com/package/@crysnovax/baileys * Severity: critical * Affected versions: 2.8.3 * Downloads: 4127 * First seen: 4 September 2026 at 06:26 UTC @crysnovax/baileys is a renamed fork of the Baileys WhatsApp Web library. On every successful connection (connection.update with connection === 'open', wired in lib/Socke

7 September 2026

10 min read

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