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Kyverno before 1.19.1 ImageValidatingPolicy Exception Bypass

Type: advisorySource: OSV1 source record

Kyverno is a policy engine for Kubernetes. In versions 1.14.0 through 1.19.0, the ImageValidatingPolicy (policies.kyverno.io/v1beta1) evaluator never reads the spec.images and spec.allowedValues fields of a PolicyException. Any PolicyException whose policyRefs and matchConditions match a resource causes image signature verification to be skipped for the entire resource rather than only for the listed images or values, so an exception intended to exempt a single trusted image exempts every image on the matched resource(s). As a result, unsigned or untrusted images can be admitted to the cluster without signature verification. This differs from ValidatingPolicy, GeneratingPolicy, and MutatingPolicy, which treat the same field as a partial exemption. The issue is fixed in version 1.19.1.

Announced Group revision 1
Original source ↗

BIT-kyverno-2026-100704

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:BIT-kyverno-2026-100704

kyverno

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
1.19.1

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "SEMVER",
        "events": [
          {
            "introduced": "1.14.0"
          },
          {
            "fixed": "1.19.1"
          }
        ]
      }
    ],
    "package": {
      "name": "kyverno",
      "purl": "pkg:bitnami/kyverno",
      "ecosystem": "Bitnami"
    },
    "severity": [
      {
        "type": "CVSS_V4",
        "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
      }
    ],
    "database_specific": {
      "source": "https://github.com/bitnami/vulndb/tree/main/data/kyverno/BIT-kyverno-2026-100704.json"
    }
  }
]
Related CVEs
CVE-2026-100704

Source reference: /aliases

Publisher severity

high

Source reference: /database_specific/severity

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2026-100704 · High

kyverno

Event
#59631 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. BIT-kyverno-2026-100704 · Revision 1Source updated