GHSA-rh9x-7xjc-vwx2: Duplicate Advisory Nokogiri XSLT Transform Has A Vulnerability

MODERATE
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CVSS 5.3
CWE-401
Published
Advisory Summary

GHSA-rh9x-7xjc-vwx2 is a MODERATE (CVSS 5.3) nokogiri xslt transform has a vulnerability (CWE-401: Missing Release of Memory after Effective Lifetime) affecting Duplicate Advisory libraries in the RubyGems ecosystem. The issue involves nokogiri xslt transform has a memory leak. Remediation is available in the latest vendor maintenance releases.

GHSA-rh9x-7xjc-vwx2 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-rh9x-7xjc-vwx2
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-401: Missing Release of Memory after Effective Lifetime
Affected Product Duplicate Advisory
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 5.3

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:L).

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 Low (A:L)

How to Fix GHSA-rh9x-7xjc-vwx2

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

nokogiri fixed: Latest secure release 
Upgrade nokogiri to Latest secure release
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 nokogiri

How to Check if You Are Affected

To determine whether your application is affected by GHSA-rh9x-7xjc-vwx2, inspect your project dependencies for Duplicate Advisory:

inspect dependencies for nokogiri

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), 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-401: Missing Release of Memory after Effective Lifetime, where the product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse. In Duplicate Advisory, 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

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-v2fc-qm4h-8hqv. This link is maintained to preserve external references. ## Original Description Nokogiri versions before 1.19.3 contain a memory leak in the XSLT Stylesheet transform method when processing Ruby strings containing null bytes. Attackers can exploit this by passing attacker-controlled input with null bytes to transform parameters, causing heap allocations to leak and enabling denial of service against long-running processes.

GHSA-rh9x-7xjc-vwx2 Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
nokogiri
gem/nokogiri
RubyGems

References

GitHub Advisory / Wiki ADVISORY
https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
NVD — GHSA-rh9x-7xjc-vwx2 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-79771
www.vulncheck.com/advisories/nokogiri... WEB
https://www.vulncheck.com/advisories/nokogiri-before-memory-leak-via-xslt-transform

Frequently Asked Questions

What is GHSA-rh9x-7xjc-vwx2?
GHSA-rh9x-7xjc-vwx2 is a security vulnerability in Duplicate Advisory involving Nokogiri XSLT transform has a memory leak under CWE-401: Missing Release of Memory after Effective Lifetime.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: nokogiri.
What version fixes GHSA-rh9x-7xjc-vwx2?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is nokogiri affected?
Yes, nokogiri is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-rh9x-7xjc-vwx2?
GHSA-rh9x-7xjc-vwx2 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with GHSA-rh9x-7xjc-vwx2?
GHSA-rh9x-7xjc-vwx2 is classified under CWE-401: Missing Release of Memory after Effective Lifetime (The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.).
How can I check RubyGems dependencies for GHSA-rh9x-7xjc-vwx2?
Run the dependency tree command: 'inspect dependencies for nokogiri'. 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-rh9x-7xjc-vwx2",
  "modified" : "2026-09-02T14:42:42Z",
  "published" : "2026-08-25T18:31:52Z",
  "withdrawn" : "2026-09-02T14:42:42Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Nokogiri XSLT transform has a memory leak",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-v2fc-qm4h-8hqv. This link is maintained to preserve external references.\n\n## Original Description\nNokogiri versions before 1.19.3 contain a memory leak in the XSLT Stylesheet transform method when processing Ruby strings containing null bytes. Attackers can exploit this by passing attacker-controlled input with null bytes to transform parameters, causing heap allocations to leak and enabling denial of service against long-running processes.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "nokogiri"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 1.19.3"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-79771"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/nokogiri-before-memory-leak-via-xslt-transform"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-401" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-02T14:42:42Z",
    "nvd_published_at" : "2026-08-25T16:17:28Z"
  }
}