What is CVE-2026-46612?

CVE-2026-46612 is a high-severity vulnerability in Fission, classified under Missing Authentication for Critical Function. CVSS score: 8.8/10. Published 2026-06-10.

How severe is CVE-2026-46612?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Fission

CVE-2026-46612

Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.23.0, the Fission storagesvc component registers archive CRUD handlers (/v1/archive GET / POST / DELETE and /v1/archives list) directly on its HTTP router without performing any authentication or authorization. Any caller able to reach the storagesvc ClusterIP — including any other workload in the same Kubernetes cluster — could enumerate archive IDs, download archives belonging to other tenants, upload arbitrary archive content, and delete archives. This issue has been patched in version 1.23.0.

Vulnerability class: Broken Authentication

EPSS: 0.003 (27.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Fission — versions < 1.23.0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-46612?: CVE-2026-46612 is a high-severity vulnerability in Fission, classified under Missing Authentication for Critical Function. CVSS score: 8.8/10. Published 2026-06-10.
How severe is CVE-2026-46612?: High severity. CVSS v3 base score is 8.8 out of 10.