CVE-2026-50567 Details
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, 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/<ns>/ directories, into mounted secret/config volumes, or into the fetcher's own binary. This issue has been patched in version 1.25.0.
A path traversal vulnerability has been identified in Fission, a Kubernetes-native serverless framework, in versions prior to 1.25.0. The issue arises in the 'Unarchive' function of 'pkg/utils/zip.go', where zip entry names are concatenated with the destination directory without proper validation. This flaw allows an attacker to craft a zip entry that escapes the intended directory, potentially leading to the extraction of files into sensitive areas such as other tenants' package directories, mounted secret or config volumes, or the fetcher's own binary. The vulnerability can be exploited by an authenticated Kubernetes user with permission to create Package Custom Resource Definitions (CRDs), by uploading a malicious zip file through the Package or Deployment URL fields.
Users can upgrade to Fission version 1.25.0 or later, where this vulnerability has been fixed. Instructions for upgrading can be found in the Fission documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 10, 2026CISA-ADP
Assessed Jun 10, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/fission/fission/pull/3444 | [email protected] | Source CodeVendor |
| https://github.com/fission/fission/releases/tag/v1.25.0 | [email protected] | Release NotesVendor |
| https://github.com/fission/fission/security/advisories/GHSA-q6vm-xqc9-v3ff | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Fission | <= 1.24.0 (semver) |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 10, 2026 | New CVE Received | [email protected] |