What’s Vulnerable › Vulnerabilities

CVE-2026-50565: Fission builder pods auto-mount the fission-builder ServiceAccount token in the user-supplied builder container

• Severity: medium (CVSS 4.9 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, Fission builder pods were created with ServiceAccountName: fission-builder and no AutomountServiceAccountToken: false, so the kubelet auto-mounted the service-account token into every container in the pod — including the user-supplied builder image. This issue has been patched in version 1.24.0.

Affected products

• fission: before 1.24.0

References

• https://github.com/fission/fission/pull/3390
• https://github.com/fission/fission/releases/tag/v1.24.0
• https://github.com/fission/fission/security/advisories/GHSA-8wcj-mfrc-jx5q

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