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PatchSiren cyber security CVE debrief

CVE-2026-49823 fission CVE debrief

CVE-2026-49823 is a vulnerability in Fission, an open-source, Kubernetes-native serverless framework. Prior to version 1.24.0, a Fission Function spec carries three reference types — Secret, ConfigMap, and Package. The first two were namespace-validated by the admission webhook; PackageRef.Namespace was not. 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 prior to version 1.24.0 should be aware of this vulnerability and take steps to upgrade to the patched version.

Technical summary

The vulnerability has a CVSS score of 7.7 and a severity of HIGH. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N. The weaknesses associated with this vulnerability are CWE-284 and CWE-863.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade to Fission version 1.24.0 or later.

Evidence notes

The CVE record can be found at [cve-org]. The NVD detail can be found at [nvd]. The source item URL can be found at [source-item]. Additional information can be found at [ref-4], [ref-5], and [ref-6].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-49823 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-49823

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

  • CVE-2026-49823 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-49823

    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.