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PatchSiren cyber security CVE debrief

CVE-2026-46614 fission CVE debrief

CVE-2026-46614 is a critical vulnerability in Fission, an open-source, Kubernetes-native serverless framework. The Fission router registers internal-style routes for every Function object, independent of whether any HTTPTrigger exists for that function. This allows any caller who can reach the router to invoke any function by guessing its metadata.name (and namespace), bypassing host / path / method / method-allow-list restrictions encoded in HTTPTrigger objects. The issue has been patched in version 1.23.0.

Vendor
fission
Product
Unknown
CVSS
CRITICAL 9.8
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 Fission, an open-source, Kubernetes-native serverless framework, should be aware of this vulnerability if they are using versions prior to 1.23.0.

Technical summary

The Fission router registers internal-style routes — /fission-function/<name> and /fission-function/<ns>/<name> — for every Function object. This allows unauthorized invocation of functions by guessing their metadata.

Defensive priority

High

Recommended defensive actions

  • Upgrade to Fission version 1.23.0 or later.
  • Review and restrict access to the Fission router.
  • Implement additional security measures to protect against unauthorized function invocation.

Evidence notes

CVE-2026-46614 has a CVSS score of 9.8 and is considered CRITICAL.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-46614 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-46614

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

  • CVE-2026-46614 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46614

    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.