CVE-2026-63328: Trivy Plugin Manager has Path Traversal that Allows Arbitrary File Write

Trivy’s plugin manager does not fully validate metadata from a plugin’s manifest before using it to construct filesystem paths under the plugin root (~/.trivy/plugins). A crafted plugin can cause Trivy to write its files (the manifest and the downloaded plugin binary) outside the plugin root, to an arbitrary location writable by the user running Trivy.

Plugins are third-party binaries that Trivy downloads and executes, so Trivy’s documentation already advises installing only plugins you trust. This issue does not change that trust boundary: exploitation requires the user to install a malicious plugin in the first place.