---
id: CVE-2026-62290
title: >-
  cert-manager adds certificates and certificate issuers as resource types in
  Kubernetes clusters, and simplifies the process of obtaining, renewing and
  using those certificates
summary: >-
  cert-manager adds certificates and certificate issuers as resource types in
  Kubernetes clusters, and simplifies the process of obtaining, renewing and
  using those certificates. From 1.18.0 until 1.19.6 and 1.20.3, Challenge
  resources und…
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N'
cwe:
  - CWE-863
published: '2026-07-16'
updated: '2026-07-18'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62290'
references:
  - url: >-
      https://github.com/cert-manager/cert-manager/commit/6bda47297c8fbc6b121b8b76624b668d26f1a155
    label: security-advisories@github.com
  - url: >-
      https://github.com/cert-manager/cert-manager/commit/b37dbf01ecea50a0b3a19df0a7fe4c5ad6803f16
    label: security-advisories@github.com
  - url: 'https://github.com/cert-manager/cert-manager/pull/8940'
    label: security-advisories@github.com
  - url: 'https://github.com/cert-manager/cert-manager/pull/8941'
    label: security-advisories@github.com
  - url: 'https://github.com/cert-manager/cert-manager/releases/tag/v1.19.6'
    label: security-advisories@github.com
  - url: 'https://github.com/cert-manager/cert-manager/releases/tag/v1.20.3'
    label: security-advisories@github.com
  - url: >-
      https://github.com/cert-manager/cert-manager/security/advisories/GHSA-8rvj-mm4h-c258
    label: security-advisories@github.com
  - url: >-
      https://github.com/cert-manager/cert-manager/security/advisories/GHSA-8rvj-mm4h-c258
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00112
epssPercentile: 0.01253
ingestedAt: '2026-07-18T20:24:54.522Z'
---

## Overview

cert-manager adds certificates and certificate issuers as resource types in Kubernetes clusters, and simplifies the process of obtaining, renewing and using those certificates. From 1.18.0 until 1.19.6 and 1.20.3, Challenge resources under acme.cert-manager.io can be created directly by namespace users without admission validation tying the Challenge to an Order, owner reference, or Issuer-selected solver, allowing attacker-controlled Challenge.spec.solver values referencing a ClusterIssuer to bypass DNS01 solver selectors such as dnsZones, dnsNames, and matchLabels and cause cert-manager to use ClusterIssuer DNS credentials for attacker-selected provider settings and DNS names, including disclosure of X-Api-User and X-Api-Key headers for acme-dns. This issue is fixed in versions 1.19.6 and 1.20.3.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.