Auth bypass in Kyverno
CVE-2025-29778
Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to version 1.14.0-alpha.1, Kyverno ignores subjectRegExp and IssuerRegExp while verifying artifact's sign with keyless mode. It allows the attacker to deploy kubernetes resources with the artifacts that were signed by unexpected certificate. Deploying these unauthorized kubernetes resources can lead to full compromise of kubernetes cluster. Version 1.14.0-alpha.1 contains a patch for the issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (24.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Kyverno — versions < 1.14.0-alpha.1
Weakness classification (CWE)
References
- github.com/kyverno/kyverno/security/advisories/GHSA-46mp-8w32-6g94 (Exploit, Vendor Advisory)
- github.com/kyverno/policies/issues/1246 (Exploit, Issue Tracking)
- github.com/kyverno/kyverno/pull/12237 (Issue Tracking)
- github.com/kyverno/kyverno/commit/8777672fb17bdf252bd2e7d8de3441e240404a60 (Patch)
- github.com/Mohdcode/kyverno/blob/373f942ea9fa8b63140d0eb0e101b9a5f71033f3/pkg/c… (Product)
Frequently asked questions
- What is CVE-2025-29778?
- CVE-2025-29778 is a medium-severity vulnerability in Kyverno, classified under Improper Authorization. CVSS score: 5.8/10. Published 2025-03-24.
- How severe is CVE-2025-29778?
- Medium severity. CVSS v3 base score is 5.8 out of 10.