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CVE-2022-50999 — Integer Overflow or Wraparound in nokogiri — CVE...

HIGH

Integer Overflow or Wraparound in libxml2 affects Nokogiri

Published May 18, 2022Updated August 27, 2026Source: osv

Summary

### Summary Nokogiri v1.13.5 upgrades the packaged version of its dependency libxml2 from v2.9.13 to [v2.9.14](https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.9.14). libxml2 v2.9.14 addresses [CVE-2022-29824](https://nvd.nist.gov/vuln/detail/CVE-2022-29824). This version also includes several security-related bug fixes for which CVEs were not created, including a potential double-free, potential memory leaks, and integer-overflow. Please note that this advisory only applies to the CRuby implementation of Nokogiri `< 1.13.5`, and only if the _packaged_ libraries are being used. If you've overridden defaults at installation time to use _system_ libraries instead of packaged libraries, you should instead pay attention to your distro's `libxml2` and `libxslt` release announcements. ### Mitigation Upgrade to Nokogiri `>= 1.13.5`. Users who are unable to upgrade Nokogiri may also choose a more complicated mitigation: compile and link Nokogiri against external libraries libxml2 `>= 2.9.14` which will also address these same issues. ### Impact #### libxml2 [CVE-2022-29824](https://nvd.nist.gov/vuln/detail/CVE-2022-29824) - **CVSS3 score**: - Unspecified upstream - Nokogiri maintainers evaluate at 8.6 (High) ([CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H)). Note that this is different from the CVSS assessed by NVD. - **Type**: Denial of service, information disclosure - **Description**: In libxml2 before 2.9.14, several buffer handling functions in buf.c (xmlBuf*) and tree.c (xmlBuffer*) don't check for integer overflows. This can result in out-of-bounds memory writes. Exploitation requires a victim to open a crafted, multi-gigabyte XML file. Other software using libxml2's buffer functions, for example libxslt through 1.1.35, is affected as well. - **Fixed**: https://gitlab.gnome.org/GNOME/libxml2/-/commit/2554a24 All versions of libml2 prior to v2.9.14 are affected. Applications parsing or serializing multi-gigabyte documents (in excess of INT_MAX bytes) may be vulnerable to an integer overflow bug in buffer handling that could lead to exposure of confidential data, modification of unrelated data, or a segmentation fault resulting in a denial-of-service. ### References - [libxml2 v2.9.14 release notes](https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.9.14) - [CVE-2022-29824](https://nvd.nist.gov/vuln/detail/CVE-2022-29824) - [CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer](https://cwe.mitre.org/data/definitions/119.html)

Advisory Timeline

  • First published May 18, 2022 (1608 days ago).
  • Last revised August 27, 2026 — 1561 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update nokogiri to 1.13.5 or later
gem install nokogiri -v 1.13.5

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
nokogiri
rubygems
1.0.0, 1.0.1, 1.0.2, 1.0.3 (+140 more)1.13.5

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.6 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

References

Frequently Asked Questions

What is CVE-2022-50999?
Integer Overflow or Wraparound in libxml2 affects Nokogiri This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.6/10).
How do I check if my project is affected by CVE-2022-50999?
CVE-2022-50999 affects nokogiri. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2022-50999 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.6

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-cgx6-hpwq-fhv5

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