# CVE-2026-50568

## Summary

- **CVE ID:** CVE-2026-50568
- **Severity:** LOW
- **CVSS Score:** 3.6 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N)
- **CWE:** CWE-41
- **Published:** Jun 10, 2026
- **Last Modified:** Jun 11, 2026

## Description

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, SanitizeFilePath in pkg/utils/utils.go validated that a path stayed under a safe directory by calling strings.HasPrefix(path, safedir). This is a lexical check, not a directory boundary check: /packages-extra/evil starts with /packages, so it passed. The function did not enforce a path-separator boundary, so any sibling directory whose name began with the safe-directory string was accepted. Callers included the builder's Clean handler (pkg/builder/builder.go:208) and the fetcher's Fetch / Upload handlers (pkg/fetcher/fetcher.go). A tenant who could pre-create or control a sibling directory under the fetcher / builder's shared volume could induce a write or read outside the intended safe directory. This issue has been patched in version 1.25.0.

## Affected Products

- fission — fission (< 1.25.0)

## References

- [CNA](https://github.com/fission/fission/security/advisories/GHSA-r5jh-q2mw-gcx4)
- [CNA](https://github.com/fission/fission/pull/3445)
- [CNA](https://github.com/fission/fission/pull/3446)
- [CNA](https://github.com/fission/fission/releases/tag/v1.25.0)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.11%
- **EPSS Percentile:** 1.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._