XSS in Kyverno
CVE-2026-44245
Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to 2.5.2, Vue 3's v-html directive is the framework-documented mechanism for injecting raw HTML, and it intentionally disables the auto-escaping that {{ }} interpolation provides. The PropertyCard.vue component uses v-html for the else branch of the URL check, meaning any non-URL string value flows directly into the DOM as HTML. The isURL() guard only filters values that parse as http: or https: URLs, so any HTML payload not starting with those schemes bypasses it entirely. The data originates from Kubernetes PolicyReport .results[].properties fields, which are arbitrary string maps populated by policy engines and potentially by any principal with write access to PolicyReport objects in the cluster. This vulnerability is fixed in 2.5.2.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (17.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Kyverno — versions < 2.5.2
- Kyverno Policy-Reporter-Ui
Weakness classification (CWE)
References
- github.com/kyverno/kyverno/security/advisories/GHSA-q98m-7w8c-w388 (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-44245?
- CVE-2026-44245 is a medium-severity vulnerability in Kyverno, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-12.
- How severe is CVE-2026-44245?
- Medium severity. CVSS v3 base score is 6.1 out of 10.