Open VSX Removes 77 Malicious Evil Twin Extensions Exfiltrating Developer Data
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A cluster of 77 extensions on the Open VSX marketplace has been found to impersonate legitimate developer tools while transmitting information about the systems and development environments on which they were installed. The "evil twin" extensions were uploaded to the repository between July 26 and August 1, 2026, according to Manifold Security. The packages have been removed from Open VSX as of
1Key Takeaways
- A cluster of 77 extensions on the Open VSX marketplace has been found to impersonate legitimate developer tools while transmitting information about the systems and development environments on which they were installed.
- The "evil twin" extensions were uploaded to the repository between July 26 and August 1, 2026, according to Manifold Security.
- The packages have been removed from Open VSX as of.
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3Why it matters
Developer tooling news affects CI/CD, observability, and how AI ships in production. The Hacker News reports that a cluster of 77 extensions on the Open VSX marketplace has been found to impersonate legitimate developer tools while transmitting information about the systems and development environments on which they were installed.
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