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CVE-2026-62290

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.

Published Jul 16, 2026CWE-863EPSS 0.11%

Overview

CVE-2026-62290 is a high-severity vulnerability. It was published on July 16, 2026 and has a CVSS 3.1 base score of 7.3 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/cert-manager/cert-manager/commit/6bda47297c8fbc6b121b8b76624b668d26f1a155GitHubgithub.com/cert-manager/cert-manager/commit/b37dbf01ecea50a0b3a19df0a7fe4c5ad6803f16GitHubgithub.com/cert-manager/cert-manager/pull/8940GitHubgithub.com/cert-manager/cert-manager/pull/8941GitHubgithub.com/cert-manager/cert-manager/releases/tag/v1.19.6GitHubgithub.com/cert-manager/cert-manager/releases/tag/v1.20.3GitHubgithub.com/cert-manager/cert-manager/security/advisories/GHSA-8rvj-mm4h-c258GitHubgithub.com/cert-manager/cert-manager/security/advisories/GHSA-8rvj-mm4h-c258

How CyberStrike helps

Frequently asked questions

What is CVE-2026-62290?

CVE-2026-62290 is a high-severity vulnerability. It was published on July 16, 2026 and has a CVSS 3.1 base score of 7.3 (HIGH).

How severe is CVE-2026-62290?

This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-62290?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-62290?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-62290 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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