CVE-2026-50568
LOWDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 2% of all known CVEs.
References
Related Vulnerabilities
Other CWE-41 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2025-21269 | Medium | 4.3 | 4.6% | - | Fix |
| CVE-2025-21247 | Medium | 4.3 | 3.2% | - | Fix |
| CVE-2025-21219 | Medium | 4.3 | 3.0% | - | Fix |
| CVE-2025-21189 | Medium | 4.3 | 3.0% | - | Fix |
| CVE-2024-30036 | Medium | 6.5 | 2.3% | - | Fix |
| CVE-2025-21268 | Medium | 4.3 | 2.0% | - | Fix |
Common questions
How do I fix CVE-2026-50568?
No published fix for CVE-2026-50568 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-50568 being actively exploited?
Not that we know of. CVE-2026-50568 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.11% is the estimated probability that it will be exploited in the next 30 days. That is higher than 2% of all scored CVEs.
How severe is CVE-2026-50568?
CVE-2026-50568 has a CVSS v3 base score of 3.6, rated low. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-10.