CVE-2026-32287: XPath Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-65xw-vw82-r86x
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CVSS 7.5
CWE-400 CWE-835
Published
Advisory Summary

CVE-2026-32287 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting XPath libraries in the Go ecosystem. The issue involves boolean expression infinite loop leads to denial of service via cpu exhaustion. Remediation is available by upgrading affected packages to version 1.3.6.

CVE-2026-32287 at a Glance

CVE Identifier CVE-2026-32287
GHSA Identifier GHSA-65xw-vw82-r86x
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product XPath
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:N/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 None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-32287

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

github.com/antchfx/xpath fixed: 1.3.6 
Upgrade github.com/antchfx/xpath to 1.3.6
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 github.com/antchfx/xpath

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-32287, inspect your project dependencies for XPath:

inspect dependencies for github.com/antchfx/xpath

Analyze the terminal output to locate any version of XPath in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.3.6), 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 XPath, 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

Boolean expressions that evaluate to true can cause an infinite loop in logicalQuery.Select, leading to 100% CPU usage. This can be triggered by top-level selectors such as "1=1" or "true()".

CVE-2026-32287 Affected XPath Versions

1 component(s)
Fixed Versions:
1.3.6
Product / Package Ecosystem Affected Versions Fixed Version
github.com/antchfx/xpath
golang/github.com/antchfx/xpath
Go
< 1.3.6
1.3.6

References

NVD — CVE-2026-32287 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32287
XPath Source Repository REPOSITORY
https://github.com/antchfx/xpath/issues/121
XPath Source Repository REPOSITORY
https://github.com/golang/vulndb/issues/4526
Security Fix Commit FIX COMMIT
https://github.com/antchfx/xpath/commit/afd4762cc342af56345a3fb4002a59281fcab494
XPath Source Repository REPOSITORY
https://github.com/antchfx/xpath
pkg.go.dev/vuln/go-2026-4526 WEB
https://pkg.go.dev/vuln/GO-2026-4526
XPath Security Information SECURITY
https://securityinfinity.com/research/infinite-loop-dos-in-antchfx-xpath-logicalquery-select

Frequently Asked Questions

What is CVE-2026-32287?
CVE-2026-32287 is a security vulnerability in XPath involving Boolean expression infinite loop leads to denial of service via CPU exhaustion under CWE-400: Uncontrolled Resource Consumption.
Which XPath versions are affected?
Affected versions include releases prior to 1.3.6 across affected packages: github.com/antchfx/xpath.
What version fixes CVE-2026-32287?
Upgrading to 1.3.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/antchfx/xpath affected?
Yes, github.com/antchfx/xpath is affected in releases prior to 1.3.6. Upgrade your dependency to 1.3.6 or later.
What is the CVSS score of CVE-2026-32287?
CVE-2026-32287 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-32287?
CVE-2026-32287 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-2026-32287?
Run the dependency tree command: 'inspect dependencies for github.com/antchfx/xpath'. 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-65xw-vw82-r86x",
  "modified" : "2026-03-30T21:19:36Z",
  "published" : "2026-03-29T15:19:45Z",
  "aliases" : [ "CVE-2026-32287" ],
  "summary" : "XPath: Boolean expression infinite loop leads to denial of service via CPU exhaustion",
  "details" : "Boolean expressions that evaluate to true can cause an infinite loop in logicalQuery.Select, leading to 100% CPU usage. This can be triggered by top-level selectors such as \"1=1\" or \"true()\".",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/antchfx/xpath"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.3.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-32287"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/antchfx/xpath/issues/121"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/golang/vulndb/issues/4526"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/antchfx/xpath/commit/afd4762cc342af56345a3fb4002a59281fcab494"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/antchfx/xpath"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2026-4526"
  }, {
    "type" : "WEB",
    "url" : "https://securityinfinity.com/research/infinite-loop-dos-in-antchfx-xpath-logicalquery-select"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-835" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-29T15:19:45Z",
    "nvd_published_at" : "2026-03-26T20:16:12Z"
  }
}