Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer

Date Jul 24, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product npm · @prompty/core
High-risk advisory

Summary

Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer

Why it matters

GitHub has published a reviewed security advisory for @prompty/core. Prioritize it with other application dependency updates.

Operator check

Check whether @prompty/core is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.