Prompty: Arbitrary code execution via JavaScript frontmatter in TypeScript loader
High-risk advisory
CVE-2026-53597
Summary
Prompty: Arbitrary code execution via JavaScript frontmatter in TypeScript loader
Why it matters
GitHub has published a reviewed security advisory for @prompty/core. Prioritize it with other application dependency updates, especially because EPSS places it in the 57% percentile.
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. CVSS score: 8.7. EPSS probability: 0.9%; percentile: 57%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.