CVE-2026-62290
Description
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.
How to fix
- linuxfoundation cert-manager1.19.6, 1.20.3 or later
- github.com/cert-manager/cert-manager1.19.6, 1.20.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linuxfoundation cert-manager | 1.18.0 ≤ v < 1.19.6, 1.20.0 ≤ v < 1.20.3 | 1.19.6, 1.20.3 |
| github.com/cert-manager/cert-managerGo | 1.18.0 ≤ v < 1.19.6, 1.20.0-alpha.0 ≤ v < 1.20.3 | 1.19.6, 1.20.3 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.