# A Supply Chain Attack Put Malicious Anthropic Claude Extensions on Thousands of Devices

> **Open Intelligence Dossier** · First detected: 2026-10-31 22:20 UTC · Category: Technology

## Executive Summary
3 news sources are covering this Technology story right now — PULSE is tracking how fast it spreads.

## Intelligence Brief
"A Supply Chain Attack Put Malicious Anthropic Claude Extensions on Thousands of Devices" is generating significant coverage in the Technology category, with 3 articles from 3 distinct sources tracked by PULSE so far.


Outlets currently covering the story include Ars Technica, Microsoft and WIRED. PULSE measures a story's velocity from how quickly new articles appear and how many independent newsrooms join the coverage.


This brief was generated by PULSE's extractive engine from coverage metadata only. The latest headlines from every source are listed below; the velocity chart shows how the story is developing in real time.

## Multi-Source Evidence Table
| Source Outlet | Headline | Verification URL |
|---|---|---|
| Ars Technica | Anthropic VS code extension on Cursor backdoored for nearly 12 hours | [Source Link](https://news.google.com/rss/articles/CBMirwFBVV95cUxOc1lMUGhmc3dMOElMYW41ZG1LLXdnbGZFZ3BNV2F5by1rNWpkSUpoMXhMUGVhUVBCVDZmaVVqbklrT0FFVjlieERXeDdsMVp1Ql9IX0FVOVM3T1ZBeUVBdXRiSmtKd1RzSll1N0Zsd0VJTEUwNHVhcGpGdEx2VE9JUHlxNkNpUThOSExsVVhGYUVTN1lCd0FtclUxZ3F5UDFRYWtBN0VQSlhKOW1BQVRv?oc=5) |
| Microsoft | Inside a malicious Claude Code-branded extension and its persistent SSH backdoor | [Source Link](https://news.google.com/rss/articles/CBMi0AFBVV95cUxPVTNFbkFXZkZqc0wyZ2ZkWjdya3FsQWFxZmY3bndubkNxN0JVbFZVRmtyN1pQOHdLU2JEY0QzcXNLN0lzT2dUaTdmQjlFVnJLU0JiOUJobVMxUUdlWjZCNGRhVVpZem43XzdESUVsZkZJcDdWMmlkYzZBaDhtbEkwYVVQVDBib1MybE11QlY0Y0xsaXBDeFduR3o4R0EzX2VYaUZyMHhVUV9GN3FjeVV1bEZhZ08xZlpOaTd1NVBLWm9RbW1sTzdVb2x1aHgteUln?oc=5) |
| WIRED | A Supply Chain Attack Put Malicious Anthropic Claude Extensions on Thousands of Devices | [Source Link](https://news.google.com/rss/articles/CBMioAFBVV95cUxPZ25XT1VwZ0xkZDJHT014UWlQbFAwaXFrUGxSaG9EY3BidHd2b3VsN2lzTm1jSjd0VGR5dmFqNnhHR2ZxMDR4RFd1QjVUVE80eFpUX2NqeGVaZGxmdXZ4RGdnNUIwU1JSUmpWdGFaY3ZXaXR2VmRUaFN5QnJKT0wzakdtTWY2b0kwZGlKLVpiU25NSkRwT1JXbDFwbV95NVhW?oc=5) |

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*Canonical Source: https://pulse.byoviral.com/trend/2026-10-31/a-supply-chain-attack-put-malicious-anthropic-claude-extensions-on-thousands-of*