Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Cert-Manager | >= 1.18.0, < 1.19.6 |
Related Weaknesses (CWE)
References
- https://github.com/cert-manager/cert-manager/commit/6bda47297c8fbc6b121b8b76624bPatch
- https://github.com/cert-manager/cert-manager/commit/b37dbf01ecea50a0b3a19df0a7fePatch
- https://github.com/cert-manager/cert-manager/pull/8940Issue TrackingPatch
- https://github.com/cert-manager/cert-manager/pull/8941Issue TrackingPatch
- https://github.com/cert-manager/cert-manager/releases/tag/v1.19.6ProductRelease Notes
- https://github.com/cert-manager/cert-manager/releases/tag/v1.20.3ProductRelease Notes
- https://github.com/cert-manager/cert-manager/security/advisories/GHSA-8rvj-mm4h-ExploitMitigationVendor Advisory
- https://github.com/cert-manager/cert-manager/security/advisories/GHSA-8rvj-mm4h-ExploitMitigationVendor Advisory
FAQ
What is CVE-2026-62290?
CVE-2026-62290 is a vulnerability with a CVSS score of 7.3 (HIGH). 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....
How severe is CVE-2026-62290?
CVE-2026-62290 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-62290?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Cert-Manager.