Skip to content
Fencer Vulns
medium 4.4

CVE-2025-22870 json

HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net

published 2025-03-12 19 mo ago modified 2026-09-10 1 mo ago also EUVD-2025-6690 , GHSA-qxp5-gwg8-xv66 , GO-2025-3503

cvss
4.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

Matching of hosts against proxy patterns can improperly treat an IPv6 zone ID as a hostname component. For example, when the NO_PROXY environment variable is set to "*.example.com", a request to "[::1%25.example.com]:80` will incorrectly match and not be proxied.

Patch / fix

  • go golang.org/x/net 0.36.0
  • go stdlib 1.23.7, 1.24.1
  • Go standard library net/http 1.23.7, 1.24.1
  • golang.org/x/net golang.org/x/net/http/httpproxy 0.36.0
  • golang.org/x/net golang.org/x/net/proxy 0.36.0
  • golang-1.24 Debian 13 1.24.1-1

debian advisories DEBIAN-CVE-2025-22870

  • golang-1.22 Ubuntu 22.04 LTS 1.22.2-2~22.04.3
  • golang-1.22 Ubuntu 24.04 LTS 1.22.2-2ubuntu0.4

ubuntu advisories UBUNTU-CVE-2025-22870

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • rhnlib RES-7:Update:Products:MultiLinuxManagerTools:Update, Multi Linux Manager Tools RES-7 5.2.5-70002.3.9.1
  • mgr-push RES-7:Update:Products:MultiLinuxManagerTools:Update, Multi Linux Manager Tools RES-7 5.2.4-70002.3.9.2
  • spacecmd RES-7:Update:Products:MultiLinuxManagerTools:Update, Multi Linux Manager Tools RES-7 5.2.8-70002.3.12.1
  • go1.22-EL RES-7:Update:Products:MultiLinuxManagerTools:Update 1.22.9-70002.1.3.2
  • saltbundlepy RES-7:Update:Products:MultiLinuxManagerTools:Update 3.11.15-70002.4.12.1
  • saltbundle-swig RES-7:Update:Products:MultiLinuxManagerTools:Update 4.1.1-70002.3.3.1
  • golang-packaging RES-7:Update:Products:MultiLinuxManagerTools:Update 15.0.17-70002.1.3.1
  • venv-salt-minion RES-7:Update:Products:MultiLinuxManagerTools:Update, Multi Linux Manager Tools RES-7 3006.0-70002.5.19.1

suse advisories SUSE-SU-2026:2765-1SUSE-SU-2026:2764-1SUSE-SU-2026:2763-1SUSE-SU-2026:2493-1SUSE-SU-2026:2468-1SUSE-SU-2026:2467-1

  • prometheus-blackbox_exporter openSUSE Leap 16.0 0.26.0-bp160.1.1
  • containerized-data-importer1.65 openSUSE Leap 16.0 1.65.0-160000.3.1
  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
  • vexctl openSUSE Leap 16.0 0.4.4+git20.5d61136-160000.1.1
  • containerized-data-importer1.65 openSUSE Tumbleweed 1.65.0-2.1
  • velociraptor openSUSE Tumbleweed 0.7.0.4.git185.a5708584-2.1
  • golang-github-prometheus-alertmanager openSUSE Leap 16.0 0.28.1-bp160.1.1
  • amazon-ssm-agent openSUSE Leap 16.0 3.3.4624.0-160000.1.1

opensuse advisories openSUSE-SU-2026:22026-1openSUSE-SU-2026:21824-1openSUSE-SU-2026:21483-1openSUSE-SU-2026:21481-1openSUSE-SU-2026:11305-1openSUSE-SU-2026:11126-1

  • go Alpine 3.21 1.23.7-r0
  • go Alpine 3.24, Alpine 3.23, Alpine 3.22 1.24.1-r0
  • rclone Alpine 3.24, Alpine 3.23, Alpine 3.22 1.69.2-r0

alpine advisories ALPINE-CVE-2025-22870

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • git-lfs CBL-Mariner 2.0 3.5.1-5
  • influxdb CBL-Mariner 2.0 2.6.1-22
  • golang CBL-Mariner 2.0 1.22.7-4
  • packer CBL-Mariner 2.0 1.9.5-12
  • vitess CBL-Mariner 2.0 17.0.7-7
  • azcopy CBL-Mariner 2.0 10.25.1-5
  • prometheus-process-exporter Azure Linux 3.0 0.8.2-2
  • telegraf Azure Linux 3.0 1.31.0-7

azure linux advisories AZL-58380AZL-58386AZL-58392AZL-58396AZL-58402AZL-58404

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-22870 updated cvss 4.4

golang.org/x/net/proxy: golang.org/x/net/http/httpproxy: HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net

  • Red Hat Assisted Installer for Red Hat OpenShift Container Platform 2 rhai-tech-preview/assisted-installer-rhel8, rhai-tech-preview/assisted-installer-reporter-rhel8 Red Hat Builds for Red Hat OpenShift openshift-builds/openshift-builds-waiters-rhel9, openshift-builds/openshift-builds-webhook-rhel9, openshift-builds/openshift-builds-controller-rhel9, openshift-builds/openshift-builds-git-cloner-rhel9, openshift-builds/openshift-builds-image-bundler-rhel9, openshift-builds/openshift-builds-shared-resource-rhel9, +2 more Red Hat cert-manager Operator for Red Hat OpenShift cert-manager/jetstack-cert-manager-rhel9, cert-manager/jetstack-cert-manager-acmesolver-rhel9 Red Hat Cryostat 3 cryostat-tech-preview/cryostat-storage-rhel8 Red Hat Custom Metric Autoscaler operator for Red Hat Openshift custom-metrics-autoscaler/custom-metrics-autoscaler-rhel8, custom-metrics-autoscaler/custom-metrics-autoscaler-adapter-rhel8, custom-metrics-autoscaler/custom-metrics-autoscaler-admission-webhooks-rhel8 Red Hat Fence Agents Remediation Operator workload-availability/fence-agents-remediation-rhel8-operator, workload-availability/fence-agents-remediation-operator-bundle
    +20 more products
    Red Hat Kube Descheduler Operator kube-descheduler-operator/descheduler-rhel9 Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/logging-loki-rhel9, openshift-logging/loki-rhel9-operator, openshift-logging/elasticsearch-rhel9-operator, openshift-logging/cluster-logging-rhel9-operator Red Hat Migration Toolkit for Applications 7 mta/mta-cli-rhel9, mta/mta-hub-rhel9, mta/mta-analyzer-addon-rhel9, mta/mta-java-external-provider-rhel9, mta/mta-generic-external-provider-rhel9 Red Hat Migration Toolkit for Containers rhmtc/openshift-migration-controller-rhel8 Red Hat Migration Toolkit for Virtualization migration-toolkit-virtualization/mtv-api-rhel9, migration-toolkit-virtualization/mtv-virt-v2v-rhel9, migration-toolkit-virtualization/mtv-controller-rhel9, migration-toolkit-virtualization/mtv-validation-rhel9, migration-toolkit-virtualization/mtv-rhv-populator-rhel8, migration-toolkit-virtualization/mtv-virt-v2v-warm-rhel8, +3 more Red Hat Multicluster Engine for Kubernetes multicluster-engine/agent-service-rhel8, multicluster-engine/assisted-service-8-rhel8, multicluster-engine/assisted-service-9-rhel9, multicluster-engine/image-based-install-rhel9, multicluster-engine/apiserver-network-proxy-rhel9, multicluster-engine/assisted-installer-reporter-rhel8 Red Hat NBDE Tang Server nbde-tang-server/nbde-tang-server-rhel9-operator, nbde-tang-server/nbde-tang-server-operator-bundle Red Hat Network Observability Operator network-observability/network-observability-cli-rhel9, network-observability/network-observability-rhel9-operator, network-observability/network-observability-operator-bundle, network-observability/network-observability-ebpf-agent-rhel9, network-observability/network-observability-flowlogs-pipeline-rhel9 Red Hat Node HealthCheck Operator workload-availability/node-healthcheck-rhel8-operator, workload-availability/node-healthcheck-operator-bundle Red Hat Node Maintenance Operator workload-availability/node-maintenance-operator-bundle, workload-availability/node-maintenance-must-gather-rhel8 Red Hat OpenShift Developer Tools and Services odo, helm, ocp-tools-4/jenkins-agent-base-rhel8, ocp-tools-4/jenkins-agent-base-rhel9 Red Hat OpenShift Pipelines openshift-pipelines-client Red Hat OpenShift Serverless kn-workflow-plugin, openshift-serverless-1/client-kn-rhel8, openshift-serverless-1/func-utils-rhel8, openshift-serverless-1/eventing-mtping-rhel8, openshift-serverless-1/eventing-webhook-rhel8, openshift-serverless-1/ingress-rhel8-operator, +14 more Red Hat OpenShift Service Mesh 2 openshift-service-mesh/kiali-rhel8, openshift-service-mesh/pilot-rhel8, openshift-service-mesh/proxyv2-rhel8, openshift-service-mesh/proxyv2-rhel9, openshift-service-mesh/istio-cni-rhel8 Red Hat OpenShift Service Mesh 3 openshift-service-mesh/istio-proxyv2-rhel9, openshift-service-mesh/istio-rhel9-operator, openshift-service-mesh/istio-must-gather-rhel9 Red Hat 3scale API Management Platform 2 3scale-amp2/3scale-operator-bundle Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/subctl-rhel9, rhacm2/thanos-rhel9, rhacm2/nettest-rhel9, rhacm2/volsync-rhel9, rhacm2/prometheus-rhel9, rhacm2/acm-grafana-rhel9, +20 more Red Hat Advanced Cluster Security 4 advanced-cluster-security/rhacs-main-rhel8, advanced-cluster-security/rhacs-roxctl-rhel8, advanced-cluster-security/rhacs-scanner-rhel8, advanced-cluster-security/rhacs-rhel8-operator, advanced-cluster-security/rhacs-central-db-rhel8, advanced-cluster-security/rhacs-scanner-db-rhel8, +4 more Red Hat Ansible Automation Platform 2 receptor, python3.11-galaxy-ng, automation-gateway-proxy Red Hat Ceph Storage 5 openshift4/grafana
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Ceph Storage 6 grafana
    affected: workaround, no fix available
  • Red Hat Ceph Storage 7 ceph, cephadm, librbd1, librgw2, rbd-nbd, ceph-mib, +16 more Red Hat Ceph Storage 8 ceph, cephadm, librbd1, librgw2, rbd-nbd, ceph-mib, +18 more Red Hat Developer Hub 1 rhdh-hub-rhel9, controller-rhel9-operator, orchestrator-operator-bundle Red Hat Edge Manager preview flightctl, rhacm2/acm-flightctl-api-rhel9, rhacm2/acm-flightctl-worker-rhel9, rhacm2/acm-flightctl-periodic-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 7 rhc, skopeo, host-metering, rhc-worker-script, host-metering-selinux
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 rhc, conmon, golang, podman, skopeo, buildah, +40 more Red Hat Enterprise Linux 9 rhc, butane, conmon, golang, podman, skopeo, +35 more Red Hat Enterprise Linux 10 rhc, delve, butane, podman, skopeo, buildah, +11 more Red Hat OpenShift AI (RHOAI) rhoai/odh-kueue-controller-rhel8, rhoai/odh-training-operator-rhel8, rhoai/odh-codeflare-operator-rhel8, rhoai/odh-ml-pipelines-driver-rhel8, rhoai/odh-ml-pipelines-launcher-rhel8, rhoai/odh-trustyai-service-operator-rhel8, +5 more Red Hat OpenShift Container Platform 4 cri-o, butane, conmon, podman, skopeo, ignition, +109 more Red Hat Openshift Data Foundation 4 odf4/mcg-cli-rhel9
    +2 more products
    Red Hat OpenShift Dev Spaces devspaces/udi-rhel8, devspaces/udi-rhel9, devspaces/traefik-rhel8, devspaces/traefik-rhel9, devspaces/configbump-rhel8, devspaces/imagepuller-rhel8, +4 more Red Hat OpenShift distributed tracing 3 rhosdt/tempo-rhel8, rhosdt/tempo-query-rhel8, rhosdt/tempo-gateway-rhel8, rhosdt/tempo-rhel8-operator, rhosdt/tempo-gateway-opa-rhel8, rhosdt/tempo-jaeger-query-rhel8
    affected: workaround, no fix available “Fix deferred”

12 more affected, 5 more fixed, 4 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
19 mo ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
GitHub 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
CNA 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

Affected packages

ecosystem package affected fixed in
go golang.org/x/net
<0.36.0
0.36.0
go stdlib
<1.23.7
>=1.24.0-0, <1.24.1
1.23.7
1.24.1

Affected products

  • Go standard library net/http
  • golang.org/x/net golang.org/x/net/http/httpproxy
  • golang.org/x/net golang.org/x/net/proxy

Classification

Weakness
  • CWE-115 Misinterpretation of Input
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.