High 7.7Published Jun 10, 2026

CVE-2026-49823Fission: Cross-namespace Package read via unvalidated PackageRef in Function admission webhook

Updated under an hour ago (Oct 27, 2026, 12:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for fission

Exploited in the last 30 days

Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. 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.

CVSS: 7.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness (CWE): CWE-284, CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jun 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

fission fission fission:fission (from the name)	before 1.24.0	CNA record

References

References

https://github.com/fission/fission/security/advisories/GHSA-3r8v-2xmj-5c39	x-refsource-confirm
https://github.com/fission/fission/pull/3389	x-refsource-misc
https://github.com/fission/fission/releases/tag/v1.24.0	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.