Cloudanix VulnDB

CVE-2026-25518

Medium · 5.9

CVSS

5.9

EPSS

0.4%

Published

Feb 4, 2026

CISA due date

—

The record

cert-manager adds certificates and certificate issuers as resource types in Kubernetes clusters, and simplifies the process of obtaining, renewing and using those certificates. In versions from 1.18.0 to before 1.18.5 and from 1.19.0 to before 1.19.3, the cert-manager-controller performs DNS lookups during ACME DNS-01 processing (for zone discovery and propagation self-checks). By default, these lookups use standard unencrypted DNS. An attacker who can intercept and modify DNS traffic from the cert-manager-controller pod can insert a crafted entry into cert-manager's DNS cache. Accessing this entry will trigger a panic, resulting in denial‑of‑service (DoS) of the cert-manager controller. The issue can also be exploited if the authoritative DNS server for the domain being validated is controlled by a malicious actor. This issue has been patched in versions 1.18.5 and 1.19.3.

Affected packages

Ecosystem Package Introduced Fixed
Go github.com/cert-manager/cert-manager 1.18.0 1.18.5
Go github.com/cert-manager/cert-manager 1.19.0 1.19.3
Chainguard aws-privateca-issuer 0 1.8.0-r3
Chainguard aws-privateca-issuer-fips 0 1.8.0-r2
Chainguard cert-manager-cmctl 0 2.4.0-r3
Chainguard cert-manager-cmctl-fips 0 2.4.0-r3
Chainguard cert-manager-csi-driver 0 0.12.0-r2
Chainguard cert-manager-csi-driver-fips 0 0.12.0-r2
Chainguard cert-manager-google-cas-issuer 0 0.10.2-r2
Chainguard cert-manager-google-cas-issuer-fips 0 0.10.2-r2
Chainguard cert-manager-istio-csr 0 0.15.0-r2
Chainguard cert-manager-istio-csr-fips 0 0.15.0-r2
Chainguard cert-manager-openshift-routes 0 0.8.4-r3
Chainguard cert-manager-openshift-routes-fips 0 0.8.4-r2
Chainguard cert-manager-webhook-pdns 0 2.5.3-r6
Chainguard cert-manager-webhook-pdns-fips 0 2.5.3-r6
Chainguard gitlab-operator 0 2.8.2-r1
Chainguard gitlab-operator-fips 0 2.8.2-r1
Chainguard mariadb-operator 0 25.10.4-r3
Chainguard mariadb-operator-fips 0 25.10.4-r2
Chainguard opentelemetry-operator 0 0.144.0-r3
Chainguard opentelemetry-operator-fips 0 0.144.0-r1
Chainguard percona-server-mongodb-operator 0 1.21.2-r3
Chainguard percona-server-mongodb-operator-fips 0 1.21.2-r2
Chainguard percona-xtradb-cluster-operator 0 1.19.0-r2
Chainguard percona-xtradb-cluster-operator-fips 0 1.19.0-r1
Chainguard percona-xtradb-cluster-operator-fips-pitr 0 1.19.0-r1
Chainguard percona-xtradb-cluster-operator-pitr 0 1.19.0-r2
Chainguard step-issuer 0 0.9.11-r2
Chainguard step-issuer-fips 0 0.9.11-r3
Wolfi aws-privateca-issuer 0 1.8.0-r3
Wolfi cert-manager-cmctl 0 2.4.0-r3
Wolfi cert-manager-csi-driver 0 0.12.0-r2
Wolfi cert-manager-istio-csr 0 0.15.0-r2
Wolfi cert-manager-webhook-pdns 0 2.5.3-r6
Wolfi mariadb-operator 0 25.10.4-r3
Wolfi opentelemetry-operator 0 0.144.0-r3
Wolfi percona-server-mongodb-operator 0 1.21.2-r3
Wolfi step-issuer 0 0.9.11-r2
openSUSE:Leap 15.6 govulncheck-vulndb 0 0.0.20260226T182644-150000.1.149.1

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