CVE-2026-50566 | Fission is an open-source, Kubernetes-native serverless fram… | CVSS 9.9 CRITICAL

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, a tenant with environments.fission.io create/update RBAC can run privileged / allowPrivilegeEscalation / dangerous-capability containers in the Fission function or builder namespace, scheduled under the executor's high-privilege service account — enabling container-sandbox escape, host filesystem and network access, and potential node- and cluster-level compromise. This issue has been patched in version 1.24.0.

Metadata

CVE ID: CVE-2026-50566
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-04 21:34 UTC
Published: 2026-06-10 17:29 UTC
Last updated: 2026-06-12 12:44 UTC
Primary CWE: CWE-250
CWE-250: Execution with Unnecessary Privileges
Vendor / Product: fission / fission
Sources: cve.org · NVD

Severity & Metrics

9.9 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
fission	fission	—	< 1.24.0

Weakness (CWE)

CWE	Source	Description
CWE-250	cna	CWE-250: Execution with Unnecessary Privileges
CWE-269	cna	CWE-269: Improper Privilege Management

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.9	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References (3)

https://github.com/fission/fission/security/advisories/GHSA-m63v-2g9w-2w6v https://github.com/fission/fission/security/advisories/GHSA-m63v-2g9w-2w6v
https://github.com/fission/fission/pull/3406 https://github.com/fission/fission/pull/3406
https://github.com/fission/fission/releases/tag/v1.24.0 https://github.com/fission/fission/releases/tag/v1.24.0