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Claude Code leak used to push infostealer malware on GitHub

ID: 3d7459ca-7bd5-5004-9505-794bf424c868

STIX ID: report--3d7459ca-7bd5-5004-9505-794bf424c868

Feed Name: DataBreaches.Net

Threat Score
65/100

Date Published: 2026-04-04

Date Updated: 2026-04-19

Author: Dissent

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**Executive summary:** Threat actors are abusing an accidental client-side source code leak of Anthropic's Claude Code (exposed via a published JavaScript source map) to create fake GitHub repositories that deliver the Vidar information-stealing malware, enabling credential and data theft; the report links the leak to active misuse but provides limited indicators and scope.

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