cert-manager: Direct ACME Challenge resources can bypass Issuer DNS01 solver policy and use ClusterIssuer DNS credentials

影響: go:github.com/cert-manager/cert-manager >= 1.18.0, < 1.19.6 → 1.19.6, go:github.com/cert-manager/cert-manager >= 1.20.0-alpha.0, < 1.20.3 → 1.20.3

Challenge resources under acme.cert-manager.io can be created directly by namespace users. On create, cert-manager performs no admission validation tying the Challenge to an Order, an owner reference, or an Issuer-selected solver. The ACME Challenge controller then reconciles the direct resource and uses Challenge.spec.solver as the DNS01 provider configuration. When the direct Challenge references a ClusterIssuer, cert-manager derives the DNS provider secret namespace and ambient-credential po…

Read on GitHub Advisory Database

On 10/30/2026, 01:39 AM, GitHub Advisory Database published "cert-manager: Direct ACME Challenge resources can bypass Issuer DNS01 solver policy and use ClusterIssuer DNS credentials" (type: Advisory). Severity is "High" (high). Related technologies: Go, GitHub. CVE: CVE-2026-62290.