Skip to main content
MEDIUM

CVE-2025-22870

CVSS v3

4.4

MEDIUM

EPSS Score

0.4 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Get an alert for each new CVE published for golang.org/x/net/proxy.

Set up CVE WatchFree account · no credit card

Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • golang.org/x/netGoall versions · fixed in 0.36.0
  • stdlibGoall versions · fixed in 1.23.7

Vendor advisories

  • CVE-2025-22870 Red Hat Product Security329 products fixed · 606 known affected

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

    rhai-tech-preview/assisted-installer-reporter-rhel8 as a component of Assisted Installer for Red Hat OpenShift Container Platform 2 · rhai-tech-preview/assisted-installer-rhel8 as a component of Assisted Installer for Red Hat OpenShift Container Platform 2 · openshift-builds/openshift-builds-controller-rhel9 as a component of Builds for Red Hat OpenShift

  • RHSA-2026:37387 Red Hat Product Security108 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.22.0 security, enhancement & bug fix update

  • RHSA-2026:34342 Red Hat Product Security24 products fixed

    Red Hat Security Advisory: Cluster Observability Operator 1.5.0

  • RHSA-2026:6503 Red Hat Product Security88 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.20.9 security, enhancement & bug fix update

  • RHSA-2025:14090 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat Developer Hub 1.7.0 release.

  • RHSA-2025:7616 Red Hat Product Security108 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.18.3 Bug Fix Update

Full record on NVD

Description

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.

Technical details

Published
2025-03-12

Frequently asked questions

What is CVE-2025-22870?

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.

Is CVE-2025-22870 actively exploited?

Active exploitation of CVE-2025-22870 has not been confirmed. Its EPSS score was 0.4% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-22870?

CVE-2025-22870 has a CVSS v3 base score of 4.4 (MEDIUM severity).

Running golang.org/x/net/proxy? Hear about its next vulnerability

CVE Watch matches each new CVE to the vendors and products you list (vendor and product, not the version) and puts it in your alerts with its KEV and EPSS status.

Get alerts for this productCISA KEV additions, October 2026Search CVEs

Already have an account? Open CVE WatchNo credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database