ADVISORY

HIGH: github.com/fission/fission — Fission: Zip Slip in pkg/utils/zip.go:Unarchive allows fetcher to write outside the destination directory

Unarchive in pkg/utils/zip.go joined each archive entry name with the destination directory via filepath.Join and wrote the result without checking whether the resolved path stayed under the destination. A zip entry named ../../tmp/evil therefore landed at…

Source github.com/fission/fissionPublished 6d ago · Jul 28, 2026Posted on Bluesky

What we hold

Package
github.com/fission/fission
Ecosystem
go
Severity
HIGH
ID
CVE-2026-50567

Unarchive in pkg/utils/zip.go joined each archive entry name with the destination directory via filepath.Join and wrote the result without checking whether the resolved path stayed under the destination. A zip entry named ../../tmp/evil therefore landed at…