CVE-2026-62290

Medium

Elevated severity or exploit probability.

CVSS base

7.3 HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

EPSS — probability of exploitation (30 days)

0.1%

1.2th percentile

CISA KEV

Not listed

Weakness / dates

CWE-863

Published 2026-07-16 · modified 2026-07-30

CVSS breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Attack Vector	L	Local
Attack Complexity	L	Low
Privileges Required	L	Low
User Interaction	N	None
Scope	C	Changed
Confidentiality	H	High
Integrity	L	Low
Availability	N	None

Timeline

2026-07-16 — Published (NVD)
2026-07-30 — Last modified (NVD)

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.

Affected

linuxfoundation

References

Official: NVD · CVE.org