CVE-2026-49824

Fission: Cross-namespace Environment reference via unvalidated EnvironmentRef in Function admission webhook

Published Jun 10, 2026 CVSS 3.1 · 8.5 High EPSS < 1% KEV · Not listed
Description
Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.24.0, the Fission Function admission webhook (pkg/webhook/function.go) validated that spec.secrets[].namespace and spec.configmaps[].namespace equalled the function's own namespace but performed no equivalent check on spec.environment.namespace. This issue has been patched in version 1.24.0.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-cvw6-gfvv-953q Fission: Cross-namespace Environment reference via unvalidated EnvironmentRef in Function admission webhook
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Fission
Fission fission
Vendors & Products Fission
Fission fission
Type Values Removed Values Added
Description Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.24.0, the Fission Function admission webhook (pkg/webhook/function.go) validated that spec.secrets[].namespace and spec.configmaps[].namespace equalled the function's own namespace but performed no equivalent check on spec.environment.namespace. This issue has been patched in version 1.24.0.
Title Fission: Cross-namespace Environment reference via unvalidated EnvironmentRef in Function admission webhook
Weaknesses CWE-284
CWE-863
References
Metrics cvssV3_1

{'score': 8.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jun 10, 2026, 6:21 PM
Reserved
Jun 1, 2026, 6:50 PM
Status
Deferred
Published
Jun 10, 2026, 6:17 PM
Modified
Jun 17, 2026, 10:55 AM