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CVE-2026-62290— cert-manager: Direct ACME Challenge resources can bypass Issuer DNS01 solver policy and use ClusterIssuer DNS credentials

Quick assessment

Affected
cert-manager cert-manager
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

cert-manager是cert-manager团队开源的一个证书管理器。将证书和证书颁发者添加为 Kubernetes 集群中的资源类型,并简化了这些证书的获取、续订和使用过程。 cert-manager 1.19.6之前版本和1.20.3之前版本存在授权问题漏洞，该漏洞源于在acme.cert-manager.io下的Challenge资源可以在没有将与Order、所有者引用或Issuer选择的solve关联的准入验证的情况下由命名空间用户直接创建，允许攻击者控制的Challenge.spec.so

CVSS 7.3 · High EPSS 0.11% · P1

Affected Version Matrix 2

VendorProduct Version RangeStatus
cert-manager cert-manager >= 1.18.0, < 1.19.6 affected
>= 1.20.0, < 1.20.3 affected
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I. Basic Information for CVE-2026-62290

Vulnerability Information
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Vulnerability Title
cert-manager: Direct ACME Challenge resources can bypass Issuer DNS01 solver policy and use ClusterIssuer DNS credentials
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
cert-manager 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
cert-manager是cert-manager团队开源的一个证书管理器。将证书和证书颁发者添加为 Kubernetes 集群中的资源类型,并简化了这些证书的获取、续订和使用过程。 cert-manager 1.19.6之前版本和1.20.3之前版本存在授权问题漏洞，该漏洞源于在acme.cert-manager.io下的Challenge资源可以在没有将与Order、所有者引用或Issuer选择的solve关联的准入验证的情况下由命名空间用户直接创建，允许攻击者控制的Challenge.spec.so
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
cert-manager cert-manager >= 1.18.0, < 1.19.6 -

II. Public POCs for CVE-2026-62290

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 12563 chars
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III. Intelligence Information for CVE-2026-62290

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Patches & Fixes for CVE-2026-62290 (4)

Vendor Advisories for CVE-2026-62290 (1)

Vendor Pages for CVE-2026-62290 (2)

IV. Related Vulnerabilities

Same product: cert-manager
Same vendor: cert-manager
Same weakness: CWE-863

V. Comments for CVE-2026-62290

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