CVE-2019-13118: Nokogiri Libxslt Type Confusion Vulnerability That Vulnerability

Q: What is CVE-2019-13118?

CVE-2019-13118 is a security vulnerability in Nokogiri involving libxslt Type Confusion vulnerability that affects Nokogiri under CWE-843: Access of Resource Using Incompatible Type ('Type Confusion').

Q: Which Nokogiri versions are affected?

Affected versions include releases prior to 1.10.5 across affected packages: nokogiri.

Q: What version fixes CVE-2019-13118?

Upgrading to 1.10.5 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: Is nokogiri affected?

Yes, nokogiri is affected in releases prior to 1.10.5. Upgrade your dependency to 1.10.5 or later.

Q: What is the CVSS score of CVE-2019-13118?

CVE-2019-13118 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Q: What CWE is associated with CVE-2019-13118?

CVE-2019-13118 is classified under CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') (The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.).

Q: How can I check RubyGems dependencies for CVE-2019-13118?

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.

HIGH

Advisory Identifier: GHSA-cf46-6xxh-pc75

CVSS 7.5

CWE-843

Published 2022-05-24

Advisory Summary

CVE-2019-13118 is a HIGH (CVSS 7.5) libxslt type confusion vulnerability that vulnerability (CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')) affecting Nokogiri libraries in the RubyGems ecosystem. The issue involves libxslt type confusion vulnerability that affects nokogiri. Remediation is available by upgrading affected packages to version 1.10.5.

CVE-2019-13118 at a Glance

CVE Identifier CVE-2019-13118

GHSA Identifier GHSA-cf46-6xxh-pc75

Severity HIGH

CVSS v3.1 Base Score 7.5

CWE Classification CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')

Affected Product Nokogiri

Package Ecosystem RubyGems

Published Date 2022-05-24

Last Updated 2026-06-09

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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 High (C:H)

Integrity None (I:N)

Availability None (A:N)

How to Fix CVE-2019-13118

To remediate this vulnerability, upgrade all affected Nokogiri 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: 1.10.5

Upgrade nokogiri to 1.10.5

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 CVE-2019-13118, inspect your project dependencies for Nokogiri:

inspect dependencies for nokogiri

Analyze the terminal output to locate any version of Nokogiri in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.10.5), 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-843: Access of Resource Using Incompatible Type ('Type Confusion'), where the product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. In Nokogiri, 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 `numbers.c` in libxslt 1.1.33, a type holding grouping characters of an `xsl:number` instruction was too narrow and an invalid character/length combination could be passed to `xsltNumberFormatDecimal`, leading to a read of uninitialized stack data. Nokogiri prior to version 1.10.5 used a vulnerable version of libxslt. Nokogiri 1.10.5 updated libxslt to version 1.1.34 to address this and other vulnerabilities in libxslt.

CVE-2019-13118 Affected Nokogiri Versions

1 component(s)

Fixed Versions:

1.10.5

Product / Package	Ecosystem	Affected Versions	Fixed Version
nokogiri gem/nokogiri	RubyGems	< 1.10.5	1.10.5

References

NVD — CVE-2019-13118 NVD

https://nvd.nist.gov/vuln/detail/CVE-2019-13118

Nokogiri Source Repository REPOSITORY

https://github.com/sparklemotion/nokogiri/issues/1943

Security Fix Commit FIX COMMIT

https://github.com/sparklemotion/nokogiri/commit/43a175339b47b8c604508813fc75b83f13cd173e

bugs.chromium.org/p/oss-fuzz/issues/d... WEB

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15069

seclists.org/bugtraq/2019/jul/36 WEB

https://seclists.org/bugtraq/2019/Jul/36

seclists.org/bugtraq/2019/jul/37 WEB

https://seclists.org/bugtraq/2019/Jul/37

seclists.org/bugtraq/2019/jul/40 WEB

https://seclists.org/bugtraq/2019/Jul/40

seclists.org/bugtraq/2019/jul/41 WEB

https://seclists.org/bugtraq/2019/Jul/41

seclists.org/bugtraq/2019/jul/42 WEB

https://seclists.org/bugtraq/2019/Jul/42

Nokogiri Security Information SECURITY

https://security.netapp.com/advisory/ntap-20190806-0004

Nokogiri Security Information SECURITY

https://security.netapp.com/advisory/ntap-20200122-0003

support.apple.com/kb/ht210346 WEB

https://support.apple.com/kb/HT210346

support.apple.com/kb/ht210348 WEB

https://support.apple.com/kb/HT210348

support.apple.com/kb/ht210351 WEB

https://support.apple.com/kb/HT210351

support.apple.com/kb/ht210353 WEB

https://support.apple.com/kb/HT210353

support.apple.com/kb/ht210356 WEB

https://support.apple.com/kb/HT210356

support.apple.com/kb/ht210357 WEB

https://support.apple.com/kb/HT210357

support.apple.com/kb/ht210358 WEB

https://support.apple.com/kb/HT210358

usn.ubuntu.com/4164-1 WEB

https://usn.ubuntu.com/4164-1

Nokogiri Security Information SECURITY

https://www.oracle.com/security-alerts/cpujan2020.html

Nokogiri Source Repository REPOSITORY

https://github.com/sparklemotion/nokogiri/blob/f7aa3b0b29d6fe5fafe93dacd9b96b6b3d16b7ec/CHANGELOG.md?plain=1#L796

Nokogiri Release RELEASE

https://github.com/sparklemotion/nokogiri/releases/tag/v1.10.5

gitlab.gnome.org/gnome/libxslt/commi... WEB

https://gitlab.gnome.org/GNOME/libxslt/commit/6ce8de69330783977dd14f6569419489875fb71b

lists.apache.org/thread.html/r58af02... WEB

https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E

lists.apache.org/thread.html/r58af02... WEB

https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E

lists.apache.org/thread.html/rf4c027... WEB

https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E

lists.apache.org/thread.html/rf4c027... WEB

https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E

lists.debian.org/debian-lts-announce... WEB

https://lists.debian.org/debian-lts-announce/2019/07/msg00020.html

lists.fedoraproject.org/archives/list/packa... WEB

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IOYJKXPQCUNBMMQJWYXOR6QRUJZHEDRZ

lists.fedoraproject.org/archives/list/packa... WEB

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IOYJKXPQCUNBMMQJWYXOR6QRUJZHEDRZ

oss-fuzz.com/testcase-detail/519... WEB

https://oss-fuzz.com/testcase-detail/5197371471822848

seclists.org/bugtraq/2019/aug/21 WEB

https://seclists.org/bugtraq/2019/Aug/21

seclists.org/bugtraq/2019/aug/22 WEB

https://seclists.org/bugtraq/2019/Aug/22

seclists.org/bugtraq/2019/aug/23 WEB

https://seclists.org/bugtraq/2019/Aug/23

seclists.org/bugtraq/2019/aug/25 WEB

https://seclists.org/bugtraq/2019/Aug/25

seclists.org/bugtraq/2019/jul/35 WEB

https://seclists.org/bugtraq/2019/Jul/35

Nokogiri Security Information SECURITY

http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00062.html

seclists.org/fulldisclosure/2019... WEB

http://seclists.org/fulldisclosure/2019/Aug/11

seclists.org/fulldisclosure/2019... WEB

http://seclists.org/fulldisclosure/2019/Aug/13

seclists.org/fulldisclosure/2019... WEB

http://seclists.org/fulldisclosure/2019/Aug/14

seclists.org/fulldisclosure/2019... WEB

http://seclists.org/fulldisclosure/2019/Aug/15

seclists.org/fulldisclosure/2019... WEB

http://seclists.org/fulldisclosure/2019/Jul/22

seclists.org/fulldisclosure/2019... WEB

http://seclists.org/fulldisclosure/2019/Jul/23

seclists.org/fulldisclosure/2019... WEB

http://seclists.org/fulldisclosure/2019/Jul/24

seclists.org/fulldisclosure/2019... WEB

http://seclists.org/fulldisclosure/2019/Jul/26

seclists.org/fulldisclosure/2019... WEB

http://seclists.org/fulldisclosure/2019/Jul/31

seclists.org/fulldisclosure/2019... WEB

http://seclists.org/fulldisclosure/2019/Jul/37

seclists.org/fulldisclosure/2019... WEB

http://seclists.org/fulldisclosure/2019/Jul/38

Nokogiri Security Information SECURITY

http://www.openwall.com/lists/oss-security/2019/11/17/2

Frequently Asked Questions

What is CVE-2019-13118?

CVE-2019-13118 is a security vulnerability in Nokogiri involving libxslt Type Confusion vulnerability that affects Nokogiri under CWE-843: Access of Resource Using Incompatible Type ('Type Confusion').

Which Nokogiri versions are affected?

Affected versions include releases prior to 1.10.5 across affected packages: nokogiri.

What version fixes CVE-2019-13118?

Upgrading to 1.10.5 (or the latest patched release for your respective branch) resolves the vulnerability.

Is nokogiri affected?

Yes, nokogiri is affected in releases prior to 1.10.5. Upgrade your dependency to 1.10.5 or later.

What is the CVSS score of CVE-2019-13118?

CVE-2019-13118 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

What CWE is associated with CVE-2019-13118?

CVE-2019-13118 is classified under CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') (The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.).

How can I check RubyGems dependencies for CVE-2019-13118?

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

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  "id" : "GHSA-cf46-6xxh-pc75",
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  "published" : "2022-05-24T16:49:07Z",
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  "summary" : "libxslt Type Confusion vulnerability that affects Nokogiri",
  "details" : "In `numbers.c` in libxslt 1.1.33, a type holding grouping characters of an `xsl:number` instruction was too narrow and an invalid character/length combination could be passed to `xsltNumberFormatDecimal`, leading to a read of uninitialized stack data.\n\nNokogiri prior to version 1.10.5 used a vulnerable version of libxslt. Nokogiri 1.10.5 updated libxslt to version 1.1.34 to address this and other vulnerabilities in libxslt.",
  "severity" : [ {
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    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
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  }, {
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    "url" : "https://usn.ubuntu.com/4164-1"
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  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-843" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-03-08T19:57:56Z",
    "nvd_published_at" : "2019-07-01T02:15:00Z"
  }
}

CVSS V3

7.5 HIGH

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 High (C:H)

Integrity None (I:N)

Availability None (A:N)

Vector String

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Advisory Metadata

Source ID: GHSA-cf46-6xxh-pc75
Schema Version: 1.4.0
Published: 2022-05-24 16:49
Last Modified: 2026-06-09 10:21
Database Record File: advisories/github-reviewed/2022/05/GHSA-cf46-6xxh-pc75/GHSA-cf46-6xxh-pc75.json