CVE-2026-21440: Adonisjs Core

Critical severity, CVSS 9.2. EPSS: 1% chance of exploitation in the next 30 days.

AdonisJS is a TypeScript-first web framework. A Path Traversal vulnerability in AdonisJS multipart file handling may allow a remote attacker to write arbitrary files to arbitrary locations on the server filesystem. This impacts @adonisjs/bodyparser through version 10.1.1 and 11.x prerelease versions prior to 11.0.0-next.6. This issue has been patched in @adonisjs/bodyparser versions 10.1.2 and 11.0.0-next.6.

Affected products

• Adonisjs Core: before 10.1.2 (fixed in 10.1.2); from 11.0.0-next.0, before 11.0.0-next.6 (fixed in 11.0.0-next.6)

Published 2026-01-02. Last modified 2026-06-17.