CVE-2026-27138
Fixed in a distro release EPSS <1%CVSS 5.9
Certificate verification can panic when a certificate in the chain has an empty DNS name and another certificate in the chain has excluded name constraints. This can crash programs that are either directly verifying X.509 certificate chains, or those that use TLS.
Products: Go standard library crypto/x509
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Go | stdlib | 1.26.1 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | amazon-k8s-cni-fips | 1.21.1-r6 |
| Chainguard | amazon-k8s-cni-init-fips | 1.21.1-r6 |
| Chainguard | amazon-k8s-cni-init-fips-compat | 1.21.1-r6 |
| Chainguard | aws-ebs-csi-driver-1.56 | 1.56.0-r3 |
| Chainguard | aws-ebs-csi-driver-fips-1.56 | 1.56.0-r3 |
| Chainguard | aws-load-balancer-controller-fips | 3.1.0-r1 |
| Chainguard | boringssl-fips-static-2023042800-tools | 0 |
| Chainguard | boringssl-fips-static-20240407-tools | 0 |
| Chainguard | cert-manager-acmesolver-fips-1.18 | 1.18.6-r1 |
| Chainguard | cert-manager-acmesolver-fips-1.19 | 1.19.4-r1 |
| Chainguard | cert-manager-cainjector-fips-1.18 | 1.18.6-r1 |
| Chainguard | cert-manager-cainjector-fips-1.19 | 1.19.4-r1 |
| Chainguard | cert-manager-controller-fips-1.18 | 1.18.6-r1 |
| Chainguard | cert-manager-controller-fips-1.19 | 1.19.4-r1 |
| Chainguard | cert-manager-fips-1.18 | 1.18.6-r1 |
| Chainguard | cert-manager-fips-1.19 | 1.19.4-r1 |
| Chainguard | cert-manager-startupapicheck-fips-1.18 | 1.18.6-r1 |
| Chainguard | cert-manager-startupapicheck-fips-1.19 | 1.19.4-r1 |
| Chainguard | cert-manager-webhook-fips-1.18 | 1.18.6-r1 |
| Chainguard | cert-manager-webhook-fips-1.19 | 1.19.4-r1 |
| Chainguard | chainguard-partners-demo | 0 |
| Chainguard | cluster-autoscaler-fips-1.35 | 1.35.0-r0 |
| Chainguard | dkron | 4.1.0-r2 |
| Chainguard | dkron-executor-gcppubsub | 4.1.0-r2 |
| Chainguard | dkron-executor-grpc | 4.1.0-r2 |
| Chainguard | dkron-executor-kafka | 4.1.0-r2 |
| Chainguard | dkron-executor-nats | 4.1.0-r2 |
| Chainguard | dkron-executor-rabbitmq | 4.1.0-r2 |
| Chainguard | dkron-processor-files | 4.1.0-r2 |
| Chainguard | dkron-processor-fluent | 4.1.0-r2 |
| Chainguard | dkron-processor-log | 4.1.0-r2 |
| Chainguard | dkron-processor-syslog | 4.1.0-r2 |
| Chainguard | flux-fips-2.8 | 2.8.1-r4 |
| Chainguard | flux-helm-controller | 1.5.3-r1 |
| Chainguard | flux-image-automation-controller | 1.1.1-r3 |
| Chainguard | flux-image-reflector-controller | 1.1.1-r1 |
| Chainguard | flux-notification-controller | 1.8.2-r1 |
| Chainguard | flux-operator | 0.45.0-r1 |
| Chainguard | flux-operator-fips | 0.43.0-r1 |
| Chainguard | flux-operator-mcp | 0.45.0-r1 |
| Chainguard | flux-operator-mcp-fips | 0.43.0-r1 |
| Chainguard | flux-source-controller | 1.8.1-r1 |
| Chainguard | flux-source-watcher | 2.1.1-r1 |
| Chainguard | gitlab-container-registry-fips-18.7 | 18.7.5-r1 |
| Chainguard | gitlab-container-registry-fips-18.8 | 18.8.5-r1 |
| Chainguard | gitlab-container-registry-fips-18.9 | 18.9.1-r1 |
| Chainguard | gitlab-logger-fips-18.7 | 0 |
| Chainguard | gitlab-logger-fips-18.8 | 0 |
| Chainguard | gitlab-logger-fips-18.9 | 0 |
| Chainguard | gitlab-shell-fips-18.7 | 18.7.5-r1 |
| Chainguard | gitlab-shell-fips-18.8 | 18.8.5-r1 |
| Chainguard | gitlab-shell-fips-18.9 | 18.9.1-r1 |
| Chainguard | go-1.26 | 1.26.1-r0 |
| Chainguard | gotenberg | 8.27.0-r2 |
| Chainguard | grafana-fips-12.0 | 12.0.10-r2 |
| Chainguard | grafana-operator | 5.22.1-r0 |
| Chainguard | grafana-operator-fips | 5.22.1-r0 |
| Chainguard | grafana-rollout-operator | 0.35.0-r2 |
| Chainguard | librechat | 0.8.3-r0 |
| Chainguard | localstack | 4.14.0-r7 |
| Chainguard | loki-fips-3.5 | 3.5.12-r0 |
| Chainguard | loki-fips-3.5-logcli | 3.5.12-r0 |
| Chainguard | loki-fips-3.5-loki-canary | 3.5.12-r0 |
| Chainguard | loki-fips-3.5-promtail | 3.5.12-r0 |
| Chainguard | metacontroller | 4.13.1-r1 |
| Chainguard | nova | 3.11.13-r1 |
| Chainguard | nova-fips | 3.11.11-r3 |
| Chainguard | omnictl-multiarch | 1.6.0-r0 |
| Chainguard | pgwatch | 5.1.0-r1 |
| Chainguard | pluto | 5.23.5-r1 |
| Chainguard | podcli | 6.11.1-r1 |
| Chainguard | podinfo | 6.11.1-r1 |
| Chainguard | polaris | 10.1.6-r1 |
| Chainguard | renovate | 0 |
| Chainguard | stakater-reloader | 1.4.14-r1 |
| Chainguard | steampipe | 2.4.0-r2 |
| Chainguard | temporal-fips | 1.6.1-r1 |
| Chainguard | terragrunt | 1.0.0-r1 |
| Chainguard | victorialogs | 1.48.0-r0 |
| Chainguard | victorialogs-fips | 1.47.0-r2 |
| Chainguard | victoriametrics | 1.138.0-r0 |
| Chainguard | victoriametrics-fips | 1.137.0-r1 |
| Chainguard | victoriametrics-vmagent | 1.138.0-r0 |
| Chainguard | victoriametrics-vmagent-cluster | 1.138.0-r0 |
| Chainguard | victoriametrics-vmagent-cluster-fips | 1.137.0-r1 |
| Chainguard | victoriametrics-vmagent-fips | 1.137.0-r1 |
| Chainguard | victoriametrics-vmalert | 1.138.0-r0 |
| Chainguard | victoriametrics-vmalert-cluster | 1.138.0-r0 |
| Chainguard | victoriametrics-vmalert-cluster-fips | 1.137.0-r1 |
| Chainguard | victoriametrics-vmalert-fips | 1.137.0-r1 |
| Chainguard | victoriametrics-vmauth | 1.138.0-r0 |
| Chainguard | victoriametrics-vmauth-fips | 1.137.0-r1 |
| Chainguard | victoriametrics-vminsert-cluster | 1.138.0-r0 |
| Chainguard | victoriametrics-vminsert-cluster-fips | 1.137.0-r1 |
| Chainguard | victoriametrics-vmselect-cluster | 1.138.0-r0 |
| Chainguard | victoriametrics-vmselect-cluster-fips | 1.137.0-r1 |
| Chainguard | victoriametrics-vmstorage-cluster | 1.138.0-r0 |
| Chainguard | victoriametrics-vmstorage-cluster-fips | 1.137.0-r1 |
| Debian 14 | golang-1.26 | 1.26.1-1 |
| Red Hat hummingbird 1 | golang1.26 | 0:1.26.2-1.hum1 |
| Red Hat hummingbird 1 | golang1.26-bin | 0:1.26.2-1.hum1 |
| Red Hat hummingbird 1 | golang1.26-docs | 0:1.26.2-1.hum1 |
| Red Hat hummingbird 1 | golang1.26-misc | 0:1.26.2-1.hum1 |
| Red Hat hummingbird 1 | golang1.26-shared | 0:1.26.2-1.hum1 |
| Red Hat hummingbird 1 | golang1.26-src | 0:1.26.2-1.hum1 |
| Red Hat hummingbird 1 | golang1.26-tests | 0:1.26.2-1.hum1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | go1.26 | 1.26.1-150000.1.6.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | go1.26-openssl | 1.26.1-150000.1.3.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | go1.26 | 1.26.1-150000.1.6.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | go1.26-openssl | 1.26.1-150000.1.3.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | go1.26 | 1.26.1-150000.1.6.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | go1.26-openssl | 1.26.1-150000.1.3.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | go1.26 | 1.26.1-150000.1.6.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | go1.26-openssl | 1.26.1-150000.1.3.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | go1.26 | 1.26.1-150000.1.6.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | go1.26-openssl | 1.26.1-150600.13.3.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | go1.26 | 1.26.1-150000.1.6.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | go1.26-openssl | 1.26.1-150000.1.3.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | go1.26 | 1.26.1-150000.1.6.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | go1.26-openssl | 1.26.1-150000.1.3.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | go1.26 | 1.26.1-150000.1.6.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | go1.26-openssl | 1.26.1-150600.13.3.1 |
| SUSE Linux Enterprise Server 16.0 | go1.26-openssl | 1.26.1-160000.1.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | go1.26 | 1.26.1-150000.1.6.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | go1.26-openssl | 1.26.1-150000.1.3.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | go1.26 | 1.26.1-150000.1.6.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | go1.26-openssl | 1.26.1-150000.1.3.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | go1.26 | 1.26.1-150000.1.6.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | go1.26-openssl | 1.26.1-150600.13.3.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | go1.26-openssl | 1.26.1-160000.1.1 |
| Ubuntu 22.04 LTS | golang-1.24 | no fix |
| Ubuntu 22.04 LTS | golang-1.25 | no fix |
| Ubuntu 22.04 LTS | golang-1.26 | no fix |
| Ubuntu 24.04 LTS | golang-1.24 | no fix |
| Ubuntu 24.04 LTS | golang-1.25 | no fix |
| Ubuntu 24.04 LTS | golang-1.26 | no fix |
| Ubuntu 25.10 | golang-1.24 | no fix |
| Ubuntu 25.10 | golang-1.25 | no fix |
| Ubuntu 26.04 LTS | golang-1.24 | no fix |
| Ubuntu 26.04 LTS | golang-1.25 | no fix |
| Ubuntu 26.04 LTS | golang-1.26 | no fix |
| Ubuntu 26.10 | golang-1.26 | no fix |
| Wolfi | dkron | 4.1.0-r2 |
| Wolfi | dkron-executor-gcppubsub | 4.1.0-r2 |
| Wolfi | dkron-executor-grpc | 4.1.0-r2 |
| Wolfi | dkron-executor-kafka | 4.1.0-r2 |
| Wolfi | dkron-executor-nats | 4.1.0-r2 |
| Wolfi | dkron-executor-rabbitmq | 4.1.0-r2 |
| Wolfi | dkron-processor-files | 4.1.0-r2 |
| Wolfi | dkron-processor-fluent | 4.1.0-r2 |
| Wolfi | dkron-processor-log | 4.1.0-r2 |
| Wolfi | dkron-processor-syslog | 4.1.0-r2 |
| Wolfi | flux-helm-controller | 1.5.3-r1 |
| Wolfi | flux-image-automation-controller | 1.1.1-r3 |
| Wolfi | flux-image-reflector-controller | 1.1.1-r1 |
| Wolfi | flux-notification-controller | 1.8.2-r1 |
| Wolfi | flux-source-controller | 1.8.1-r1 |
| Wolfi | go-1.26 | 1.26.1-r0 |
| Wolfi | grafana-operator | 5.22.1-r0 |
| Wolfi | grafana-rollout-operator | 0.35.0-r2 |
| Wolfi | metacontroller | 4.13.1-r1 |
| Wolfi | nova | 3.11.13-r1 |
| Wolfi | pluto | 5.23.5-r1 |
| Wolfi | podcli | 6.11.1-r1 |
| Wolfi | podinfo | 6.11.1-r1 |
| Wolfi | polaris | 10.1.6-r1 |
| Wolfi | renovate | 0 |
| Wolfi | stakater-reloader | 1.4.14-r1 |
| Wolfi | steampipe | 2.4.0-r2 |
| Wolfi | terragrunt | 1.0.0-r1 |
| Wolfi | victoriametrics | 1.138.0-r0 |
| Wolfi | victoriametrics-vmagent | 1.138.0-r0 |
| Wolfi | victoriametrics-vmagent-cluster | 1.138.0-r0 |
| Wolfi | victoriametrics-vmalert | 1.138.0-r0 |
| Wolfi | victoriametrics-vmalert-cluster | 1.138.0-r0 |
| Wolfi | victoriametrics-vmauth | 1.138.0-r0 |
| Wolfi | victoriametrics-vminsert-cluster | 1.138.0-r0 |
| Wolfi | victoriametrics-vmselect-cluster | 1.138.0-r0 |
| Wolfi | victoriametrics-vmstorage-cluster | 1.138.0-r0 |
| openSUSE Leap 15.6 | go1.26 | 1.26.1-150000.1.6.1 |
| openSUSE Leap 15.6 | go1.26-openssl | 1.26.1-150600.13.3.1 |
| openSUSE Leap 15.6 | govulncheck-vulndb | 0.0.20260317T205859-150000.1.152.1 |
| openSUSE Leap 16.0 | go1.26 | 1.26.1-160000.1.1 |
| openSUSE Leap 16.0 | go1.26-openssl | 1.26.1-160000.1.1 |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 |
| openSUSE Tumbleweed | go1.26 | 1.26.1-1.1 |
| openSUSE Tumbleweed | steampipe | 2.4.1-1.1 |