PT-2026-48512 · Fission · Fission

Published 2026-06-10 · Updated 2026-06-10 · CVE-2026-50567

Mitre

CVSS v3.1

7.7

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.25.0, 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 /tmp/evil. An attacker who could control a Package.Spec.Source.URL or Deployment.URL archive could induce the fetcher (running as the per-environment pod's fission-fetcher sidecar) to write files anywhere that process could reach: into other tenants' /packages// directories, into mounted secret/config volumes, or into the fetcher's own binary. This issue has been patched in version 1.25.0.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-50567

Affected Products

Fission

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-50567 · Security Note
• https://github.com/fission/fission/security/advisories/GHSA-q6vm-xqc9-v3ff · Note
• https://github.com/fission/fission/pull/3444 · Note
• https://github.com/fission/fission/releases/tag/v1.25.0 · Note