Vulnerabilities in pkg:golang/golang.org/x/net

PACKAGE
Advisory Identifier: GHSA-5cv4-jp36-h3mw
Share
Advisory Summary

CVE-2026-25680 is a MODERATE (CVSS 6.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Golang.org/x/net libraries in the Go ecosystem. The issue involves go net html parser is vulnerable to denial of service. Remediation is available by upgrading affected packages to version 0.55.0.

21 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:golang/golang.org/x/net

21 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:golang/golang.org/x/net. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-5cv4-jp36-h3mw CVE-2026-25680 MODERATE Go Net HTML parser is vulnerable to denial of service
GHSA-qppj-fm5r-hxr3 CVE-2023-44487 MODERATE HTTP/2 Stream Cancellation Attack
GHSA-qxp5-gwg8-xv66 CVE-2025-22870 MODERATE HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net
GHSA-4v7x-pqxf-cx7m CVE-2023-45288 MODERATE net/http, x/net/http2: close connections when receiving too many headers
GHSA-vvgc-356p-c3xw CVE-2025-22872 MODERATE golang.org/x/net vulnerable to Cross-site Scripting
GHSA-fxg5-wq6x-vr4w CVE-2022-41721 HIGH golang.org/x/net/http2/h2c vulnerable to request smuggling attack
GHSA-vvpx-j8f3-3w6h CVE-2022-41723 HIGH golang.org/x/net vulnerable to Uncontrolled Resource Consumption
GHSA-xrjj-mj9h-534m CVE-2022-41717 MODERATE golang.org/x/net/http2 vulnerable to possible excessive memory growth
GHSA-69cg-p879-7622 CVE-2022-27664 HIGH golang.org/x/net/http2 Denial of Service vulnerability
GHSA-39qc-96h7-956f CVE-2019-9514 HIGH golang.org/x/net/http vulnerable to a reset flood
GHSA-hgr8-6h9x-f7q9 CVE-2019-9512 HIGH golang.org/x/net/http vulnerable to ping floods
GHSA-mv93-wvcp-7m7r CVE-2018-17848 HIGH golang.org/x/net/html Improper Validation of Array Index vulnerability
GHSA-4r78-hx75-jjj2 CVE-2018-17847 HIGH golang.org/x/net/html has Improper Restriction of Operations within the Bounds of a Memory Buffer
GHSA-fcf9-6fv2-fc5v CVE-2018-17143 HIGH golang.org/x/net/html has Improper Restriction of Operations within the Bounds of a Memory Buffer
GHSA-2wp2-chmh-r934 CVE-2018-17142 HIGH golang.org/x/net/html NULL Pointer Dereference vulnerability
GHSA-h86h-8ppg-mxmh CVE-2021-31525 MODERATE golang.org/x/net/http/httpguts vulnerable to Uncontrolled Recursion
GHSA-83g2-8m93-v3w7 CVE-2021-33194 HIGH golang.org/x/net/html Infinite Loop vulnerability
GHSA-5p4h-3377-7w67 CVE-2018-17075 HIGH golang.org/x/net/html NULL Pointer Dereference vulnerability
GHSA-vfw5-hrgq-h5wf CVE-2018-17846 HIGH x/net/html Vulnerable to DoS During HTML Parsing
GHSA-4374-p667-p6c8 CVE-2023-39325 HIGH HTTP/2 rapid reset can cause excessive work in net/http
GHSA-2wrh-6pvc-2jm9 CVE-2023-3978 MODERATE Improper rendering of text nodes in golang.org/x/net/html

CVE-2026-25680 at a Glance

CVE Identifier CVE-2026-25680
GHSA Identifier GHSA-5cv4-jp36-h3mw
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Golang.org/x/net
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-25680

To remediate this vulnerability, upgrade all affected Golang.org/x/net dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

golang.org/x/net fixed: 0.55.0 
Upgrade golang.org/x/net to 0.55.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for golang.org/x/net

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-25680, inspect your project dependencies for Golang.org/x/net:

inspect dependencies for golang.org/x/net

Analyze the terminal output to locate any version of Golang.org/x/net in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.55.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Golang.org/x/net, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

In Go Net (`golang.org/x/net`) before verion 0.55.0, parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.

CVE-2026-25680 Affected Golang.org/x/net Versions

1 component(s)
Fixed Versions:
0.55.0
Product / Package Ecosystem Affected Versions Fixed Version
golang.org/x/net
golang/golang.org/x/net
Go
< 0.55.0
0.55.0

References

NVD — CVE-2026-25680 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25680
go.dev/cl/781702 WEB
https://go.dev/cl/781702
go.dev/issue/79573 WEB
https://go.dev/issue/79573
go.googlesource.com/net/+/08be507abce89... WEB
https://go.googlesource.com/net/+/08be507abce89191d78cd49da60f4501fc910472
go.googlesource.com/net/+/refs/tags/v0.... WEB
https://go.googlesource.com/net/+/refs/tags/v0.55.0
groups.google.com/g/golang-announce/c... WEB
https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8
pkg.go.dev/vuln/go-2026-5028 WEB
https://pkg.go.dev/vuln/GO-2026-5028
cs.opensource.google... PACKAGE
cs.opensource.google/go/x/net

Frequently Asked Questions

What is CVE-2026-25680?
CVE-2026-25680 is a security vulnerability in Golang.org/x/net involving Go Net HTML parser is vulnerable to denial of service under CWE-400: Uncontrolled Resource Consumption.
Which Golang.org/x/net versions are affected?
Affected versions include releases prior to 0.55.0 across affected packages: golang.org/x/net.
What version fixes CVE-2026-25680?
Upgrading to 0.55.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is golang.org/x/net affected?
Yes, golang.org/x/net is affected in releases prior to 0.55.0. Upgrade your dependency to 0.55.0 or later.
What is the CVSS score of CVE-2026-25680?
CVE-2026-25680 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-25680?
CVE-2026-25680 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check Go dependencies for CVE-2026-25680?
Run the dependency tree command: 'inspect dependencies for golang.org/x/net'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5cv4-jp36-h3mw",
  "modified" : "2026-07-01T17:58:07Z",
  "published" : "2026-05-26T13:30:17Z",
  "aliases" : [ "CVE-2026-25680" ],
  "summary" : "Go Net HTML parser is vulnerable to denial of service",
  "details" : "In Go Net (`golang.org/x/net`) before verion 0.55.0, parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "golang.org/x/net"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.55.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-25680"
  }, {
    "type" : "WEB",
    "url" : "https://go.dev/cl/781702"
  }, {
    "type" : "WEB",
    "url" : "https://go.dev/issue/79573"
  }, {
    "type" : "WEB",
    "url" : "https://go.googlesource.com/net/+/08be507abce89191d78cd49da60f4501fc910472"
  }, {
    "type" : "WEB",
    "url" : "https://go.googlesource.com/net/+/refs/tags/v0.55.0"
  }, {
    "type" : "WEB",
    "url" : "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2026-5028"
  }, {
    "type" : "PACKAGE",
    "url" : "cs.opensource.google/go/x/net"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-01T17:58:07Z",
    "nvd_published_at" : "2026-05-22T16:16:19Z"
  }
}