Secuno
ENNL
Book demo

CVE-2026-62290

Linuxfoundation Cert-manager broken access control

7.3 HIGHPublic exploitEPSS 0.11%
  1. Published16 Jul 2026

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.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Affected products

Linuxfoundation Cert-manager≥ 1.18.0 < 1.19.6 · ≥ 1.20.0 < 1.20.3

Remediation

Fixed in
Linuxfoundation Cert-manager≥ 1.19.6

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-163018.5
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.7 before…
CVE-2026-1095598.7
EdgeEver Desktop 1.6.26 through 1.112.0 contains a navigation allowlist bypass that…
CVE-2026-773669.9
obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian…
CVE-2026-1039038.8
An incorrect authorization vulnerability in the WinBox authentication flow of MikroTik…
CVE-2026-1087468.8
Vearch 3.5.2 through 3.5.9 contains an incorrect authorization vulnerability in…
CVE-2026-816499.1
The Fundiin cho WooCommerce WordPress plugin through 3.4.0 does not have proper…

Frequently asked

Is CVE-2026-62290 being actively exploited?

CVE-2026-62290 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.11%.

How severe is CVE-2026-62290?

CVE-2026-62290 has a CVSS 3.1 base score of 7.3, rated high. EPSS estimates a 0.11% probability of exploitation.

Which products are affected by CVE-2026-62290?

Affected products include Linuxfoundation Cert-manager.

How do I fix CVE-2026-62290?

Upgrade affected software to a fixed version, for example Linuxfoundation Cert-manager 1.19.6 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-62290 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.