SSRF in Kyverno
CVE-2026-41323
Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4, Kyverno's apiCall feature in ClusterPolicy automatically attaches the admission controller's ServiceAccount token to outgoing HTTP requests. The service URL has no validation — it can point anywhere, including attacker-controlled servers. Since the admission controller SA has permissions to patch webhook configurations, a stolen token leads to full cluster compromise. Versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4 patch the issue.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (45.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000
Affected products
- Kyverno — versions < 1.16.4, >= 1.17.0-rc1, < 1.17.2-rc1
Weakness classification (CWE)
References
- github.com/kyverno/kyverno/security/advisories/GHSA-f9g8-6ppc-pqq4 (Exploit, Vendor Advisory)
- github.com/kyverno/kyverno/commit/bc4f91c4801b1eaa2edc0a14e2f1b0af8cf0c1f5 (Patch)
- github.com/kyverno/kyverno/commit/c2eab00033e635bda4e4efb58c1b472b41728bb6 (Patch)
- github.com/kyverno/kyverno/commit/f70e8ac1e7acd2e3844f9553e4a884f07f953de0 (Patch)
Frequently asked questions
- What is CVE-2026-41323?
- CVE-2026-41323 is a high-severity vulnerability in Kyverno, classified under Information Disclosure. CVSS score: 8.1/10. Published 2026-04-24.
- How severe is CVE-2026-41323?
- High severity. CVSS v3 base score is 8.1 out of 10.