OpenSSF/OSV advisory MAL-2026-3811 confirms this npm version as malicious. The package claude-code-base-action was found to contain malicious code.
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in claude-code-base-action (npm)
Details
The package claude-code-base-action was found to contain malicious code.
## Source: ossf-package-analysis (f08c76c834d5f7c2ce735d4dd85684ec34f3dcc29e1353dc7633fb72ee79aaaf) The OpenSSF Package Analysis project identified 'claude-code-base-action' @ 2.0.0 (npm) as malicious.
It is considered malicious because:
- The package communicates with a domain associated with malicious activity.
Decision reason
OpenSSF Malicious Packages via OSV confirms claude-code-base-action@2.0.0 as malicious (MAL-2026-3811): Malicious code in claude-code-base-action (npm)