PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-50569 fission CVE debrief

CVE-2026-50569 is a MEDIUM severity vulnerability in Fission, an open-source, Kubernetes-native serverless framework. The vulnerability allows an attacker to bypass URL-level checks when creating an HTTPTrigger via kubectl apply or a direct Kubernetes REST API call. This is due to the HTTPTriggerSpec.Validate() function not validating the RelativeURL and Prefix fields prior to version 1.25.0.

Vendor
fission
Product
Unknown
CVSS
MEDIUM 4.3
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 1.25.0.

Technical summary

The HTTPTriggerSpec.Validate() function in Fission did not validate the RelativeURL and Prefix fields prior to version 1.25.0. This allowed an attacker to bypass URL-level checks when creating an HTTPTrigger via kubectl apply or a direct Kubernetes REST API call. The vulnerability has been patched in version 1.25.0.

Defensive priority

MEDIUM

Recommended defensive actions

  • Upgrade to Fission version 1.25.0 or later to patch the vulnerability.
  • Use the official Fission release: [Fission v1.25.0](resourceLinkAnnotations:ref-5).

Evidence notes

The vulnerability was patched in version 1.25.0. For more information, see the [Fission release notes](resourceLinkAnnotations:ref-5) and the [CVE record](resourceLinkAnnotations:cve-org).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50569 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50569

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

  • CVE-2026-50569 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50569

    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.