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PatchSiren cyber security CVE debrief

CVE-2026-49822 fission CVE debrief

CVE-2026-49822 is a high-severity vulnerability in the Fission Kubernetes-native serverless framework. A low-privilege developer who could create a KubernetesWatchTrigger (KWT) in their own namespace was able to establish a persistent surveillance channel over any other namespace. This issue has been patched in version 1.24.0.

Vendor
fission
Product
Unknown
CVSS
HIGH 7.7
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 Fission Kubernetes-native serverless framework, particularly those with low-privilege developers who can create KubernetesWatchTrigger (KWT) in their own namespace.

Technical summary

Prior to version 1.24.0, a low-privilege developer who could create a KubernetesWatchTrigger (KWT) in their own namespace was able to establish a persistent surveillance channel over any other namespace.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade to Fission version 1.24.0 or later.
  • Restrict the creation of KubernetesWatchTrigger (KWT) to authorized users.

Evidence notes

The vulnerability has been patched in version 1.24.0. Users can refer to [ref-5](https://github.com/fission/fission/releases/tag/v1.24.0) for more information.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-49822 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-49822

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

  • CVE-2026-49822 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-49822

    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.