GHSA-xqqh-3w52-q8p7: Duplicate Advisory Nokogiri Does Not Check The Vulnerability

MODERATE
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CVSS 5.3
CWE-252
Published
Advisory Summary

GHSA-xqqh-3w52-q8p7 is a MODERATE (CVSS 5.3) nokogiri does not check the vulnerability (CWE-252: Unchecked Return Value) affecting Duplicate Advisory libraries in the RubyGems ecosystem. The issue involves nokogiri does not check the return value from xmlc14nexecute. Remediation is available in the latest vendor maintenance releases.

GHSA-xqqh-3w52-q8p7 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-xqqh-3w52-q8p7
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-252: Unchecked Return Value
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:L/A:N).

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 Low (I:L)
Availability None (A:N)

How to Fix GHSA-xqqh-3w52-q8p7

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-xqqh-3w52-q8p7, 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-252: Unchecked Return Value, where the product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. 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-wx95-c6cv-8532. This link is maintained to preserve external references. ## Original Description Nokogiri versions before 1.19.1 fail to check the return value from xmlC14NExecute in the canonicalize method, returning an empty string on failure instead of raising an exception. Attackers can exploit this to bypass signature validation in downstream SAML libraries by providing invalid canonicalized XML that is incorrectly accepted as valid.

GHSA-xqqh-3w52-q8p7 Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
nokogiri
gem/nokogiri
RubyGems
≥ 1.5.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
NVD — GHSA-xqqh-3w52-q8p7 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-79772
www.vulncheck.com/advisories/nokogiri... WEB
https://www.vulncheck.com/advisories/nokogiri-before-unchecked-return-value-canonicalize

Frequently Asked Questions

What is GHSA-xqqh-3w52-q8p7?
GHSA-xqqh-3w52-q8p7 is a security vulnerability in Duplicate Advisory involving Nokogiri does not check the return value from xmlC14NExecute under CWE-252: Unchecked Return Value.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: nokogiri.
What version fixes GHSA-xqqh-3w52-q8p7?
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-xqqh-3w52-q8p7?
GHSA-xqqh-3w52-q8p7 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:L/A:N.
What CWE is associated with GHSA-xqqh-3w52-q8p7?
GHSA-xqqh-3w52-q8p7 is classified under CWE-252: Unchecked Return Value (The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions.).
How can I check RubyGems dependencies for GHSA-xqqh-3w52-q8p7?
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-xqqh-3w52-q8p7",
  "modified" : "2026-09-02T14:42:17Z",
  "published" : "2026-08-25T18:31:53Z",
  "withdrawn" : "2026-09-02T14:42:17Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Nokogiri does not check the return value from xmlC14NExecute",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-wx95-c6cv-8532. This link is maintained to preserve external references.\n\n## Original Description\nNokogiri versions before 1.19.1 fail to check the return value from xmlC14NExecute in the canonicalize method, returning an empty string on failure instead of raising an exception. Attackers can exploit this to bypass signature validation in downstream SAML libraries by providing invalid canonicalized XML that is incorrectly accepted as valid.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/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" : "1.5.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 1.19.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-79772"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/nokogiri-before-unchecked-return-value-canonicalize"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-252" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-02T14:42:17Z",
    "nvd_published_at" : "2026-08-25T16:17:28Z"
  }
}