What is CVE-2023-33191?

CVE-2023-33191 is a medium-severity vulnerability in Kyverno, classified under Improper Access Control. CVSS score: 4.6/10. Published 2023-05-30.

How severe is CVE-2023-33191?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Vulnerability in Kyverno

CVE-2023-33191

Kyverno is a policy engine designed for Kubernetes. Kyverno seccomp control can be circumvented. Users of the podSecurity `validate.podSecurity` subrule in Kyverno 1.9.2 and 1.9.3 are vulnerable. This issue was patched in version 1.9.4.

Published 2023-05-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.005 (39.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Kyverno — versions >= 1.9.2, < 1.9.4
Nirmata Kyverno

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

github.com/kyverno/kyverno/security/advisories/GHSA-33hq-f2mf-jm3c (Vendor Advisory)
github.com/kyverno/kyverno/pull/7263 (Issue Tracking)
github.com/kyverno/kyverno/releases/tag/v1.9.4 (Release Notes)

Frequently asked questions

What is CVE-2023-33191?: CVE-2023-33191 is a medium-severity vulnerability in Kyverno, classified under Improper Access Control. CVSS score: 4.6/10. Published 2023-05-30.
How severe is CVE-2023-33191?: Medium severity. CVSS v3 base score is 4.6 out of 10.