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CVE-2026-62290

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

Published: Jul 16, 2026Updated: Jul 30, 2026 Sources: CVE List NVDCWE-863
7.3HIGH
NVD MITRE
EPSS Score
0.1%
Top 98.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:CC:HI:LA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-863

Affected Products

cert-manager
oss-project
cert-managerOn-prem
Cloud & SaaS / container-orchestration
linuxfoundation
oss-project·USaka pytorch, yocto, everest
cert-managerMixed
AI / ML / ml-framework

Exploitability

Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
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References

https://github.com/cert-manager/cert-manager/security/advisories/GHSA-8rvj-mm4h-c258
github.com
https://github.com/cert-manager/cert-manager/pull/8940
github.com
https://github.com/cert-manager/cert-manager/pull/8941
github.com
and 4 more references View all →

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