Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2026-27145

Unchecked Input for Loop Condition

Published: Jun 02, 2026 | Modified: Aug 14, 2026
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
7.5 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-27145
CWEhttps://cwe.mitre.org/data/definitions/606.html

(*x509.Certificate).VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name (SAN) entries. This caused strings.Split(host, .) to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically based on the number of SAN entries multiplied by the hostnames label count. Because x509.Verify validates hostnames before building the certificate chain, this overhead occurred even for untrusted certificates.

Weakness

The product does not properly check inputs that are used for loop conditions, potentially leading to a denial of service or other consequences because of excessive looping.

Affected Software

NameVendorStart VersionEnd Version
Red Hat Ansible Automation Platform 2.5 for RHEL 8RedHatreceptor-0:1.6.7-1.el8ap*
Red Hat Ansible Automation Platform 2.5 for RHEL 9RedHatreceptor-0:1.6.7-1.el9ap*
Red Hat Ansible Automation Platform 2.6 for RHEL 10RedHatreceptor-0:1.6.6-1.el10ap*
Red Hat Ansible Automation Platform 2.6 for RHEL 9RedHatreceptor-0:1.6.6-1.el9ap*
Red Hat Ansible Automation Platform 2.7 for RHEL 10RedHatreceptor-0:1.6.6-1.el10ap*
Red Hat Ansible Automation Platform 2.7 for RHEL 9RedHatreceptor-0:1.6.6-1.el9ap*
Red Hat Enterprise Linux 10RedHatgolang-0:1.26.4-1.el10_2*
Red Hat Enterprise Linux 10RedHatopentelemetry-collector-0:0.152.1-1.el10_2*
Red Hat Enterprise Linux 10RedHatgolang-github-openprinting-ipp-usb-0:0.9.27-7.el10_2.2*
Red Hat Enterprise Linux 10RedHatrhc-1:0.3.8-6.el10_2*
Red Hat Enterprise Linux 10RedHatyggdrasil-0:0.4.9.2-1.el10_2*
Red Hat Enterprise Linux 10RedHatrhc-worker-playbook-0:0.2.10-1.el10_2*
Red Hat Enterprise Linux 10RedHatgo-fdo-client-0:1.0.0-4.el10_2.5*
Red Hat Enterprise Linux 10RedHatgo-fdo-server-0:1.0.1-2.el10_2.3*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatdelve-0:1.26.1-1.el10_0*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatyggdrasil-0:0.4.7-5.el10_0*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatrhc-1:0.3.2-5.el10_0*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatopentelemetry-collector-0:0.152.1-1.el10_0*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatrhc-worker-playbook-0:0.2.3-6.el10_0*
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRedHathost-metering-0:1.4.0-8.el7_9*
Red Hat Enterprise Linux 8RedHatgo-toolset:rhel8-8100020260710105056.a3795dee*
Red Hat Enterprise Linux 8RedHatrhc-1:0.2.5-9.el8_10*
Red Hat Enterprise Linux 9RedHatgolang-0:1.26.4-1.el9_8*
Red Hat Enterprise Linux 9RedHatopentelemetry-collector-0:0.152.1-1.el9_8*
Red Hat Enterprise Linux 9RedHatskopeo-2:1.22.2-7.el9_8*
Red Hat Enterprise Linux 9RedHatrhc-1:0.2.7-8.el9_8*
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRedHatopentelemetry-collector-0:0.152.1-1.el9_4*
Red Hat Enterprise Linux 9.6 Extended Update SupportRedHatopentelemetry-collector-0:0.152.1-1.el9_6*
Red Hat Enterprise Linux 9.6 Extended Update SupportRedHatrhc-1:0.2.7-1.el9_6.5*
Red Hat OpenStack Platform 16.2RedHatcollectd-sensubility-0:0.2.1-1.1.el8ost*
Red Hat Satellite 6.16 for RHEL 8RedHatyggdrasil-worker-forwarder-0:0.0.4-1.el8sat*
Red Hat Satellite 6.16 for RHEL 9RedHatyggdrasil-worker-forwarder-0:0.0.4-1.el9sat*
Red Hat Satellite 6.17 for RHEL 9RedHatyggdrasil-worker-forwarder-0:0.0.4-1.el9sat*
Red Hat Satellite 6.18 for RHEL 9RedHatyggdrasil-worker-forwarder-0:0.0.4-1.el9sat*
Red Hat Satellite 6.19 for RHEL 9RedHatyggdrasil-worker-forwarder-0:0.0.4-1.el9sat*
Streams for Apache Kafka 3.2.1RedHatgolang-github-danielqsj-kafka_exporter*
Cert Manager support for Red Hat OpenShift release 1.19RedHatcert-manager/jetstack-cert-manager-rhel9:1786613805*
Compliance Operator 1RedHatcompliance/openshift-compliance-operator-bundle:1786380082*
External secrets operator for Red Hat OpenShift 1.1RedHatexternal-secrets-operator/external-secrets-rhel9:1786614676*
Multicluster engine for Kubernetes 2.10RedHatmulticluster-engine/clusterclaims-controller-rhel9:1786549223*
Multicluster engine for Kubernetes 2.8RedHatmulticluster-engine/backplane-rhel9-operator:1784737366*
Multicluster engine for Kubernetes 2.8RedHatmulticluster-engine/hypershift-addon-rhel9-operator:1784738758*
Multicluster engine for Kubernetes 2.8RedHatmulticluster-engine/kube-rbac-proxy-mce-rhel9:1784677239*
Multicluster Global Hub 1.6.5RedHatmulticluster-globalhub/multicluster-globalhub-agent-rhel9:1784152046*
Multicluster Global Hub 1.7.2RedHatmulticluster-globalhub/multicluster-globalhub-agent-rhel9:1784768332*
Multicluster Global Hub 1.7.2RedHatmulticluster-globalhub/multicluster-globalhub-agent-rhel9:1785775948*
Multicluster Global Hub 1.8.0RedHatmulticluster-globalhub/multicluster-globalhub-agent-rhel9:1785763319*
OpenShift Developer Tools and Services 1.6.3RedHatsource-to-image/source-to-image-rhel8:1784727697*
OpenShift Developer Tools and Services 1.6.3RedHatsource-to-image/source-to-image-rhel9:1784728036*
Red Hat Advanced Cluster Management for Kubernetes 2.13RedHatrhacm2/kube-rbac-proxy-rhel9:1784677172*
Red Hat Advanced Cluster Management for Kubernetes 2.13RedHatrhacm2/multiclusterhub-rhel9:1784638644*
Red Hat Advanced Cluster Management for Kubernetes 2.13RedHatrhacm2/multicluster-observability-rhel9-operator:1784590741*
Red Hat Advanced Cluster Management for Kubernetes 2.15RedHatrhacm2/multicluster-operators-application-rhel9:1786547792*
Red Hat Advanced Cluster Management for Kubernetes 2.15RedHatrhacm2/multicluster-operators-channel-rhel9:1786547807*
Red Hat Advanced Cluster Management for Kubernetes 2.15RedHatrhacm2/multicluster-operators-subscription-rhel9:1786549537*
Red Hat Ansible Automation Platform 2.7RedHatansible-automation-platform-27/receptor-rhel9:1783917963*
Red Hat Developer Hub 1.9RedHatrhdh/rhdh-rhel9-operator:1782767215*
Red Hat Hardened ImagesRedHatgolang1-25-main-1.25.11-2.hum1*
Red Hat Hardened ImagesRedHatgolang1-26-main-1.26.4-2.hum1*
Red Hat Lightspeed (formerly Insights) for Runtimes 1.0RedHatrh-lightspeed-runtimes/runtimes-inventory-rhel9-operator:1786483782*
Red Hat multicluster global hub 1.4.2RedHatmulticluster-globalhub/multicluster-globalhub-agent-rhel9:1784061472*
Red Hat OpenShift AI 2.25RedHatrhoai/odh-rhel9-operator:1784004914*
Red Hat OpenShift Builds 1.7.4RedHatopenshift-builds/openshift-builds-waiters-rhel9:1783057868*
Red Hat OpenShift Builds 1.8.1RedHatopenshift-builds/openshift-builds-rhel9-operator:1784121108*
Red Hat OpenShift Builds 1.8.1RedHatopenshift-builds/openshift-builds-waiters-rhel9:1783612119*
Red Hat OpenShift distributed tracing 3.10.0RedHatrhosdt/opentelemetry-collector-rhel9:1785704636*
Red Hat OpenShift distributed tracing 3.10.0RedHatrhosdt/opentelemetry-rhel9-operator:1785704547*
Red Hat OpenShift Service Mesh 3.0RedHatopenshift-service-mesh/istio-cni-rhel9:1784885742*
Red Hat OpenShift Service Mesh 3.0RedHatopenshift-service-mesh/istio-pilot-rhel9:1784885559*
Red Hat OpenShift Service Mesh 3.0RedHatopenshift-service-mesh/istio-proxyv2-rhel9:1784908682*
Red Hat OpenShift Service Mesh 3.0RedHatopenshift-service-mesh/istio-rhel9-operator:1784917979*
Red Hat OpenShift Service Mesh 3.1RedHatopenshift-service-mesh/istio-cni-rhel9:1784885281*
Red Hat OpenShift Service Mesh 3.1RedHatopenshift-service-mesh/istio-pilot-rhel9:1784885133*
Red Hat OpenShift Service Mesh 3.1RedHatopenshift-service-mesh/istio-proxyv2-rhel9:1784953556*
Red Hat OpenShift Service Mesh 3.1RedHatopenshift-service-mesh/istio-rhel9-operator:1784918113*
Red Hat OpenShift Service Mesh 3.2RedHatopenshift-service-mesh/istio-cni-rhel9:1784921753*
Red Hat OpenShift Service Mesh 3.2RedHatopenshift-service-mesh/istio-pilot-rhel9:1784921772*
Red Hat OpenShift Service Mesh 3.2RedHatopenshift-service-mesh/istio-proxyv2-rhel9:1784953743*
Red Hat OpenShift Service Mesh 3.2RedHatopenshift-service-mesh/istio-rhel9-operator:1784918117*
Red Hat OpenShift Service Mesh 3.3RedHatopenshift-service-mesh/istio-cni-rhel9:1784885810*
Red Hat OpenShift Service Mesh 3.3RedHatopenshift-service-mesh/istio-pilot-rhel9:1784885681*
Red Hat OpenShift Service Mesh 3.3RedHatopenshift-service-mesh/istio-proxyv2-rhel9:1784908639*
Red Hat OpenShift Service Mesh 3.3RedHatopenshift-service-mesh/istio-rhel9-operator:1785316150*
Red Hat OpenShift Service Mesh 3.4RedHatopenshift-service-mesh/istio-cni-rhel9:1785131046*
Red Hat OpenShift Service Mesh 3.4RedHatopenshift-service-mesh/istio-pilot-rhel9:1785131063*
Red Hat OpenShift Service Mesh 3.4RedHatopenshift-service-mesh/istio-proxyv2-rhel9:1785131291*
Red Hat OpenShift Service Mesh 3.4RedHatopenshift-service-mesh/istio-rhel9-operator:1785317214*
Red Hat Trusted Artifact Signer 1.4RedHatconforma-cli-stack-v1-4-1.4.2*
Red Hat Trusted Artifact Signer 1.4RedHatconforma-cli-stack-v1-4-1.4.2*
Red Hat Trusted Artifact Signer 1.4RedHatconforma-cli-stack-v1-4-1.4.3*
Red Hat Trusted Artifact Signer 1.4RedHatconforma-cli-stack-v1-4-1.4.3*
Red Hat Trusted Artifact Signer 1.4RedHatconforma-cli-stack-v1-4-1.4.3*
Red Hat Web Terminal 1.11RedHatweb-terminal/web-terminal-exec-rhel9:1784296203*
Red Hat Web Terminal 1.12RedHatweb-terminal/web-terminal-exec-rhel9:1784247610*
Red Hat Web Terminal 1.13RedHatweb-terminal/web-terminal-exec-rhel9:1784296127*
Red Hat Web Terminal 1.14RedHatweb-terminal/web-terminal-exec-rhel9:1784296114*
Red Hat Web Terminal 1.15RedHatweb-terminal/web-terminal-exec-rhel9:1784296033*
Golang-1.24Ubuntuquesting*
Golang-1.25Ubuntuquesting*

Potential Mitigations

References

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