CVE-2026-62290 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-62290HIGH

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

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  C  H  L  N    7.3   .0010    1.2     —

AFFECTED
  Product       Versions               Fixed
  cert-manager  >= 1.18.0, < 1.19.6 –  —

TIMELINE
  Jul 13  Reserved by GitHub_M
  Jul 16  EXPLOIT PUBLISHED — CVE-2026-62290 (cert-manager). Public exploit reference added.
  Jul 16  Published (CNA: GitHub_M)

CWE-863 · CNA: GitHub_M · CVSS v3.1 · 7 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 13, 2026	Reserved	Reserved by GitHub_M
July 16, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-62290 (cert-manager). Public exploit reference added.
July 16, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
cert-manager	cert-manager	—	>= 1.18.0, < 1.19.6	—

Weaknesses

CWE-863

References (7)

https://github.com/cert-manager/cert-manager/commit/6bda47297c8fbc6b121b8b76624b668d26f1a155 [Patch]
https://github.com/cert-manager/cert-manager/commit/b37dbf01ecea50a0b3a19df0a7fe4c5ad6803f16 [Patch]
https://github.com/cert-manager/cert-manager/pull/8940 [Issue Tracking, Patch]
https://github.com/cert-manager/cert-manager/pull/8941 [Issue Tracking, Patch]
https://github.com/cert-manager/cert-manager/releases/tag/v1.19.6 [Product, Release Notes]
https://github.com/cert-manager/cert-manager/releases/tag/v1.20.3 [Product, Release Notes]
https://github.com/cert-manager/cert-manager/security/advisories/GHSA-8rvj-mm4h-c258 [Exploit, Mitigation, Vendor Advisory]

Authoritative record: CVE-2026-62290 at cve.org

Vendors: cert-manager

Weaknesses: CWE-863

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-62290 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.