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Noroxi
NVD / CVE Program· CNA Go

CVE-2025-22870: HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net

Noroxi assessment

Priority: Monitor (action score 17/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.42% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: 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.

Low priority for now. Upgrade to 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 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 4.4 · v3.1—Proof of concept Fix available
Published
Mar 12, 2025
Updated
Jun 17, 2026
EPSS
0.4% · 37th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-22870

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Go). Independent of NVD's CPE analysis and usually ahead of it.

  • Go standard library net/http

    • before 1.23.7affected · semver
    • 1.24.0-0 and later · before 1.24.1affected · semver

  • golang.org/x/net golang.org/x/net/http/httpproxy

    • before 0.36.0affected · semver

  • golang.org/x/net golang.org/x/net/proxy

    • before 0.36.0affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.21gobefore 1.23.7-r01.23.7-r0
Alpine:v3.22gobefore 1.24.1-r01.24.1-r0
Alpine:v3.22rclonebefore 1.69.2-r01.69.2-r0
Debian:12golang-1.19from 0—
Debian:13golang-1.24before 1.24.1-11.24.1-1
Gogolang.org/x/netbefore 0.36.00.36.0
Gostdlibfrom 1.24.0-0 · before 1.24.11.24.1
Gostdlibbefore 1.23.71.23.7
openSUSE:Leap 15.6amazon-ssm-agentbefore 3.3.1611.0-150000.5.23.13.3.1611.0-150000.5.23.1
openSUSE:Leap 15.6apptainerbefore 1.4.5-150600.4.12.11.4.5-150600.4.12.1
openSUSE:Leap 15.6apptainerbefore 1.3.6-150600.4.9.11.3.6-150600.4.9.1
openSUSE:Leap 15.6cosignbefore 2.5.0-150400.3.27.12.5.0-150400.3.27.1
openSUSE:Leap 15.6go1.23before 1.23.7-150000.1.24.11.23.7-150000.1.24.1
openSUSE:Leap 15.6go1.23-opensslbefore 1.23.12-150600.13.9.11.23.12-150600.13.9.1
openSUSE:Leap 15.6go1.24before 1.24.1-150000.1.12.11.24.1-150000.1.12.1
openSUSE:Leap 15.6golang-github-prometheus-alertmanagerbefore 0.26.0-150100.4.25.20.26.0-150100.4.25.2
openSUSE:Leap 15.6golang-github-prometheus-node_exporterbefore 1.9.1-150100.3.35.21.9.1-150100.3.35.2
openSUSE:Leap 15.6golang-github-prometheus-prometheusbefore 2.53.4-150100.4.26.22.53.4-150100.4.26.2
openSUSE:Leap 15.6grafanabefore 11.5.5-150200.3.72.211.5.5-150200.3.72.2
openSUSE:Leap 15.6helmbefore 3.17.2-150000.1.44.13.17.2-150000.1.44.1
openSUSE:Leap 15.6ignitionbefore 2.14.0-150400.9.9.12.14.0-150400.9.9.1
openSUSE:Leap 15.6prometheus-blackbox_exporterbefore 0.26.0-150000.1.27.10.26.0-150000.1.27.1
openSUSE:Leap 15.6skopeobefore 1.14.4-150300.11.22.11.14.4-150300.11.22.1
openSUSE:Leap 15.6squashfusebefore 0.5.0-150600.3.2.10.5.0-150600.3.2.1

+96

Same product

go standard library: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-45288HTTP/2 CONTINUATION flood in net/http
    57Plan
  • CVE-2026-78663Double flow control refund on HTTP/2 server streams in net/http
    36Monitor
  • CVE-2026-97032HTTP/2 server crash due to HPACK encoder race in net/http
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2024-24791Jul 2, 2024 · Denial of service due to improper 100-continue handling in net/http
    30Monitor
  • ← EarlierCVE-2024-45336Jan 27, 2025 · Sensitive headers incorrectly sent after cross-domain redirect in net/http
    24Monitor
  • Later →CVE-2025-4673Jun 11, 2025 · Sensitive headers not cleared on cross-origin redirect in net/http
    27Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Go standard library net/http1.23.7Vendor (CNA)
Go standard library net/http1.24.1Vendor (CNA)
golang.org/x/net golang.org/x/net/http/httpproxy0.36.0Vendor (CNA)
golang.org/x/net golang.org/x/net/proxy0.36.0Vendor (CNA)
azl3 azcopy 10.25.1-4 on Azure Linux 3.010.25.1-4 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 git-lfs 3.6.1-2 on Azure Linux 3.03.6.1-2 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 golang 1.27.0-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 influxdb 2.7.5-3 on Azure Linux 3.02.7.5-3 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 influxdb 2.7.5-5 on Azure Linux 3.02.7.5-3 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 keda 2.14.1-6 on Azure Linux 3.02.14.1-6 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 keda 2.14.1-7 on Azure Linux 3.02.14.1-6 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 packer 1.9.5-8 on Azure Linux 3.01.9.5-8 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 packer 1.9.5-9 on Azure Linux 3.01.9.5-8 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 prometheus 2.45.4-12 on Azure Linux 3.02.45.4-12 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 prometheus-node-exporter 1.7.0-3 on Azure Linux 3.01.7.0-3 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 prometheus-process-exporter 0.8.2-2 on Azure Linux 3.00.8.2-2 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 telegraf 1.31.0-10 on Azure Linux 3.01.31.0-6 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 telegraf 1.31.0-6 on Azure Linux 3.01.31.0-6 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 vitess 19.0.4-6 on Azure Linux 3.019.0.4-6 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 vitess 19.0.4-7 on Azure Linux 3.019.0.4-6 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 azcopy 10.25.1-4 on CBL Mariner 2.010.25.1-4 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 azcopy 10.25.1-5 on CBL Mariner 2.010.25.1-4 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 azcopy 10.25.1-5 on CBL-Mariner 2.010.25.1-4 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 git-lfs 3.5.1-5 on CBL Mariner 2.03.5.1-5 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 git-lfs 3.5.1-5 on CBL-Mariner 2.03.5.1-5 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 golang 1.18.8-8 on CBL Mariner 2.01.18.8-8 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 golang 1.18.8-8 on CBL-Mariner 2.01.18.8-8 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 golang 1.22.7-4 on CBL Mariner 2.01.22.7-4 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 golang 1.22.7-4 on CBL-Mariner 2.01.22.7-4 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 influxdb 2.6.1-22 on CBL Mariner 2.02.6.1-22 · CBL-Mariner ReleasesMicrosoft (MSRC)

+48

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:22025-06-08

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+87 d
  3. TodayNov 10, 2026+608 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
none
Availability
low · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
Low

Weakness class (CWE)

CWE-115 · Misinterpretation of Input

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records