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Fencer Vulns
critical 9.1

CVE-2026-90711 json

proxy-addr vulnerable to IP spoofing via IPv4-mapped IPv6 trust subnet

published 2026-09-15 55 d ago modified 2026-10-05 34 d ago also GHSA-jqcg-44mw-7w3h , EUVD-2026-78300

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 17%
public exploits
0
none known

Summary

proxy-addr is a Node.js module that determines a request's client address behind trusted reverse proxies, and it backs Express req.ip and req.ips. In versions 1.1.0 through 2.0.7, a trust subnet written in IPv4-mapped IPv6 notation with an IPv4-sized prefix, such as ::ffff:10.0.0.0/8 instead of the correct ::ffff:10.0.0.0/104, is accepted without error but trusts every IPv4 address on the internet rather than the block it names. Because the socket peer then becomes trusted at hop 0, any unauthenticated client can supply an arbitrary X-Forwarded-For header and control the address the application reads, which defeats IP-based access control, rate limiting, geolocation, and audit logging. This is a fail-open regression introduced in version 1.1.0. The issue is fixed in proxy-addr 2.0.8, and users should upgrade to 2.0.8 or later. As a workaround, ensure any IPv4-mapped IPv6 trust subnet uses a prefix length of at least 97, or express the range in plain IPv4 notation.

Patch / fix

  • npm proxy-addr 2.0.8
  • proxy-addr proxy-addr 2.0.8
  • node-proxy-addr Debian 14 2.0.8+~cs2.3.7-1

debian advisories DEBIAN-CVE-2026-90711

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-2026-90711 updated cvss 7.5

proxy-addr: proxy-addr vulnerable to IP spoofing via IPv4-mapped IPv6 trust subnet

  • Red Hat Ansible Automation Orchestrator 2026 ansible-automation-platform/automation-orchestrator-ui-rhel9 Red Hat Migration Toolkit for Applications 8 mta/mta-ui-rhel9, mta/mta-solution-server-rhel9 Red Hat Node HealthCheck Operator workload-availability/node-remediation-console-rhel8, workload-availability/node-healthcheck-rhel9-operator, workload-availability/node-healthcheck-operator-bundle, workload-availability/node-healthcheck-must-gather-rhel9 Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-agentic-console-rhel9 Red Hat OpenShift Pipelines openshift-pipelines/pipelines-hub-ui-rhel8, openshift-pipelines/pipelines-hub-ui-rhel9 Red Hat OpenShift Serverless openshift-serverless-1/kn-eventing-integrations-log-sink-rhel9, openshift-serverless-1/kn-eventing-integrations-aws-s3-sink-rhel9, openshift-serverless-1/kn-eventing-integrations-aws-sns-sink-rhel9, openshift-serverless-1/kn-eventing-integrations-aws-sqs-sink-rhel9, openshift-serverless-1/kn-eventing-integrations-timer-source-rhel9, openshift-serverless-1/kn-eventing-integrations-aws-s3-source-rhel9, +3 more
    affected: workaround, no fix available
  • Red Hat Ansible Automation Platform 2 automation-gateway, automation-controller, automation-eda-controller, ansible-automation-platform-27/mcp-server-rhel9, ansible-automation-platform-tech-preview/mcp-server-rhel9
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat build of Apache Camel - HawtIO 4 rhaf-hawtio-maven-repository.zip Red Hat Build of Podman Desktop rh-podman-desktop Red Hat Enterprise Linux 9 sgx-mpa, tdx-qgs, sgx-libs, sgx-pccs, linux-sgx, sgx-common, +2 more Red Hat Enterprise Linux 10 linux-sgx Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/bootc-gaudi-rhel9, rhelai3/disk-image-cuda-rhel9 Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-dashboard-operator-rhel9, rhoai/odh-mod-arch-agent-ops-rhel9, rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9
    +3 more products
    Red Hat Openshift Data Foundation 4 odf4/mcg-core-rhel9 Red Hat Quay 3 quay/quay-rhel8 Red Hat Secrets Management Console for Red Hat OpenShift external-secrets-management/console-plugin-rhel9
    affected: workaround, no fix available
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-openshift-console-plugin-rhel9 4.2.0-19
    fixed: vendor fix RHSA-2026:95360
  • Red Hat Ansible Automation Platform 2.2 ansible-automation-platform/automation-portal 1792523640, ansible-automation-platform/bootc-automation-portal-rhel9 1793772689
    fixed: vendor fix RHSA-2026:86675
  • Red Hat Ansible Automation Platform 2.6 for RHEL 9 automation-platform-ui 2.6.15-1.el9ap
    fixed: vendor fix RHSA-2026:87004
  • Red Hat Developer Hub 1.10 rhdh/rhdh-hub-rhel9 1792593817, rhdh/red-hat-developer-hub-backstage-plugin-lightspeed-backend 1792506092, rhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend 1792509044, rhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend-module-loki 1792508506, rhdh/red-hat-developer-hub-backstage-plugin-scaffolder-backend-module-orchestrator 1792508522
    fixed: vendor fix RHSA-2026:86957
  • Red Hat Migration Toolkit 1.8 rhmtc/openshift-migration-ui-rhel8 1791853281
    fixed: vendor fix RHSA-2026:85846
show 12 more
  • Red Hat OpenShift AI 3.4 rhoai/odh-dashboard-rhel9 1793001801, rhoai/odh-mod-arch-maas-rhel9 1793001859, rhoai/odh-feature-server-rhel9 1792685074, rhoai/odh-mod-arch-automl-rhel9 1793001841, rhoai/odh-mod-arch-gen-ai-rhel9 1793001896, rhoai/odh-mod-arch-mlflow-rhel9 1793001851, +3 more
    fixed: vendor fix RHSA-2026:92510
  • Red Hat OpenShift Dev Spaces 3.31 devspaces/code-rhel9 1792599388, devspaces/jetbrains-ide-rhel9 1792476427
    fixed: vendor fix RHSA-2026:90321
  • Red Hat Satellite 6.18 satellite/iop-remediations-rhel9 1793065138
    fixed: vendor fix RHSA-2026:92584
  • Red Hat Satellite 6.19 satellite/iop-remediations-rhel9 1793092253
    fixed: vendor fix RHSA-2026:92578
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-rhel9 4.2.0-18, cryostat/cryostat-db-rhel9 4.2.0-29, cryostat/jfr-datasource-rhel9 4.2.0-19, cryostat/cryostat-reports-rhel9 4.2.0-19, cryostat/cryostat-storage-rhel9 4.2.0-28, cryostat/cryostat-rhel9-operator 4.2.0-29, +3 more Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-console-plugin-rhel9, openshift-lightspeed/lightspeed-console-plugin-419-rhel9, openshift-lightspeed/lightspeed-console-plugin-pf5-rhel9
    not affected: vulnerable code not present
  • Red Hat OpenShift Service Mesh 3 openshift-service-mesh/kiali-rhel9-operator, openshift-service-mesh/kiali-operator-bundle
    not affected: component not present
  • Red Hat 3scale API Management Platform 2 3scale-amp2/system-rhel8
    not affected: vulnerable code not in execute path
  • Red Hat AMQ Broker 7 amq-broker-bin.zip, amq-broker-maven-repository.zip
    not affected: vulnerable code not present
  • Red Hat Ansible Automation Platform 2 ansible-automation-platform-24/lightspeed-rhel8, ansible-automation-platform-25/lightspeed-rhel8
    not affected: vulnerable code not in execute path
  • Red Hat Ansible Automation Platform 2.6 for RHEL 9 receptor 1.6.9-1.el9ap, molecule 26.10.0-1.el9ap, receptorctl 1.6.9-1.el9ap, ansible-lint 26.10.1-1.el9ap, ansible-rulebook 1.2.3-1.el9ap, automation-hub 4.11.15-1.el9ap, +51 more Red Hat Ansible Automation Platform 2.6 for RHEL 10 receptor 1.6.9-1.el10ap, molecule 26.10.0-1.el10ap, python-cffi 2.0.0-2.el10ap, receptorctl 1.6.9-1.el10ap, python3-cffi 2.0.0-2.el10ap, ansible-lint 26.10.1-1.el10ap, +11 more
    not affected: vulnerable code not present
  • Red Hat build of Apache Camel for Spring Boot 4 rhaf-camel-maven-repository.zip, rhaf-camel-spring-boot-maven-repository.zip, rhaf-camel-for-springboot-maven-repository.zip
    not affected: component not present
  • Red Hat Data Grid 8 redhat-datagrid-maven-repository.zip Red Hat Developer Hub 1.10 rhdh/rhdh-rhel9-operator 1792594036, rhdh/rhdh-operator-bundle 1792597359, rhdh/rhdh-must-gather-rhel9 1792501528, rhdh/rhdh-rag-content-rhel9 1792500854, rhdh/red-hat-developer-hub-backstage-plugin-lightspeed 1792506610, rhdh/red-hat-developer-hub-backstage-plugin-orchestrator 1792508537, +1 more Red Hat Discovery 2 discovery/discovery-ui-rhel9 Red Hat Enterprise Linux 8 pcs, grafana, mozjs60, pcs-snmp, grafana-loki, grafana-mssql, +11 more Red Hat Enterprise Linux 9 pcs, grafana, pcs-snmp, grafana-selinux Red Hat Enterprise Linux 10 pcs, grafana
    not affected: vulnerable code not present

9 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
total
Assessed
55 d ago

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
GitHub 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
npm proxy-addr
>=1.1.0, <2.0.8
2.0.8

Affected products

  • proxy-addr proxy-addr

Classification

Weakness
  • CWE-290 Authentication Bypass by Spoofing
  • CWE-348 Use of Less Trusted Source
  • CWE-697 Incorrect Comparison

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.