CVE-2026-44245

Description

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.

CVSS Details

CVSS Score

6.1

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Configurations (Affected Products)

No configuration data available.

Kyverno < 2.5.2

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

apiVersion: wgpolicyk8s.io/v1alpha2
kind: ClusterPolicyReport
metadata:
  name: cve-2026-44245-poc
results:
  - policy: example-policy
    rule: example-rule
    properties:
      # This payload bypasses the isURL() check which only looks for http/https
      malicious_property: "<img src=x onerror=alert('CVE-2026-44245-XSS')>"

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-44245
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-44245
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-44245/
[4] VulDB https://vuldb.com/cve/CVE-2026-44245
[5] https://github.com/kyverno/kyverno/security/advisories/GHSA-q98m-7w8c-w388

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-44245", "sourceIdentifier": "[email protected]", "published": "2026-05-12T23:16:18.060", "lastModified": "2026-05-12T23:16:18.060", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://github.com/kyverno/kyverno/security/advisories/GHSA-q98m-7w8c-w388", "source": "[email protected]"}]}}