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Home/Vulnerability/CVE-2026-50566

CVE-2026-50566

Fission: Environment Runtime.Container and Builder.Container SecurityContext bypass allows privileged pod creation

Published: Jun 10, 2026Updated: Jun 10, 2026 Sources: CVE List NVD
NVD MITRE
9.9CVSS
CRITICAL

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

CWE-250CWE-269

Affected Products

fission
fission

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Privilege Escalation
View detailed technique mapping

References

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

Timeline

Published
Jun 10, 2026
Last Updated
Jun 10, 2026

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