Vulnerability from bitnami_vulndb
Published
2026-04-23 08:41
Modified
2026-04-23 09:10
Summary
kyverno apicall servicecall implicit bearer token injection leaks kyverno serviceaccount token
Details

Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to 1.16.4, kyverno’s apiCall servicecall helper implicitly injects Authorization: Bearer ... using the kyverno controller serviceaccount token when a policy does not explicitly set an Authorization header. Because context.apiCall.service.url is policy-controlled, this can send the kyverno serviceaccount token to an attacker-controlled endpoint (confused deputy). Namespaced policies are blocked from servicecall usage by the namespaced urlPath gate in pkg/engine/apicall/apiCall.go, so this report is scoped to ClusterPolicy and global context usage. This vulnerability is fixed in 1.16.4.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "kyverno",
        "purl": "pkg:bitnami/kyverno"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.16.4"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-40868"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:go:*:*"
    ],
    "severity": "High"
  },
  "details": "Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to 1.16.4, kyverno\u2019s apiCall servicecall helper implicitly injects Authorization: Bearer ... using the kyverno controller serviceaccount token when a policy does not explicitly set an Authorization header. Because context.apiCall.service.url is policy-controlled, this can send the kyverno serviceaccount token to an attacker-controlled endpoint (confused deputy). Namespaced policies are blocked from servicecall usage by the namespaced urlPath gate in pkg/engine/apicall/apiCall.go, so this report is scoped to ClusterPolicy and global context usage. This vulnerability is fixed in 1.16.4.",
  "id": "BIT-kyverno-2026-40868",
  "modified": "2026-04-23T09:10:51.830Z",
  "published": "2026-04-23T08:41:53.633Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kyverno/kyverno/security/advisories/GHSA-q93q-v844-jrqp"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40868"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "kyverno apicall servicecall implicit bearer token injection leaks kyverno serviceaccount token"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.