What’s Vulnerable › Vulnerabilities

CVE-2026-50566: Fission: Environment Runtime.Container and Builder.Container SecurityContext bypass allows privileged pod creation

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-10 · updated 2026-06-17
• Weakness: CWE-250

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.

Affected products

• fission: before 1.24.0

References

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

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