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PatchSiren cyber security CVE debrief

CVE-2026-46617 fission CVE debrief

CVE-2026-46617 is a high-severity vulnerability in the Fission Kubernetes-native serverless framework. Prior to version 1.23.0, Fission runtime pods were created with ServiceAccountName: fission-fetcher, and the fission-fetcher ServiceAccount was granted namespace-wide get on secrets and configmaps. This allowed user-supplied function code to inherit the same Kubernetes API privileges and read any secret or configmap in the function's namespace, far beyond the Function.spec.secrets allowlist. The issue has been patched in version 1.23.0.

Vendor
fission
Product
Unknown
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-10
Advisory published
2026-06-10
Advisory updated
2026-06-10

Who should care

Users of the Fission Kubernetes-native serverless framework, particularly those who have not upgraded to version 1.23.0 or later.

Technical summary

Fission runtime pods were created with ServiceAccountName: fission-fetcher, which had namespace-wide get permissions on secrets and configmaps. User-supplied function code could access /var/run/secrets/kubernetes.io/serviceaccount/token, allowing it to read any secret or configmap in the function's namespace.

Defensive priority

High

Recommended defensive actions

  • Upgrade to Fission version 1.23.0 or later.
  • Review and restrict ServiceAccount permissions for fission-fetcher.
  • Limit access to sensitive data and secrets in the function's namespace.

Evidence notes

CVE-2026-46617 has a CVSS score of 8.7 and is considered HIGH severity. The vulnerability was patched in Fission version 1.23.0.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-46617 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-46617

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-46617 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46617

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.