🕵🏻♂️ [InfoSec MASHUP] 21/2026 - The Supply Chain Didn't Break. It Was Walked.
This week's issue reads like a case study in cascade failure. A malicious VS Code extension on one #GitHub employee's device leads to 3,800 internal repositories exfiltrated — by #TeamPCP, the same group that poisoned 170 npm and #PyPI packages last week. #Grafana gets breached via a token nobody rotated after the TanStack attack, itself a TeamPCP operation. A GitHub Action used by thousands of projects gets compromised and starts exfiltrating CI/CD credentials. And somewhere in a public GitHub spreadsheet, CISA contractor credentials — including #AWS GovCloud keys — sat waiting to be found.
These aren't four separate incidents. They're one incident with four manifestations. The supply chain isn't a vector anymore; it's the terrain. Developer tooling, CI/CD pipelines, third-party actions, tokens issued and forgotten — all of it is now actively mapped and exploited with a persistence that makes the traditional "patch and move on" response look quaint. The Verizon DBIR dropped this week noting that third-party compromise is surging. The week's news was already illustrating the point before the report landed.
→ Week #21/2026 also covers: fast16 predated #Stuxnet and corrupted nuclear simulations quietly, #Pwn2Own Berlin paid $1.3M for 47 bugs, and #Bluesky got hijacked for Russian propaganda.
Full issue 👉 https://infosec-mashup.santolaria.net/p/infosec-mashup-21-2026-the-supply-chain-didn-t-break-it-was-walked
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