GHSA-3w22-6jfg-527w

Source

https://github.com/advisories/GHSA-3w22-6jfg-527w

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-3w22-6jfg-527w/GHSA-3w22-6jfg-527w.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-3w22-6jfg-527w

Aliases

CVE-2026-126064

Published

2026-11-10T20:51:19Z

Modified

2026-11-10T21:00:04Z

Severity

2.0 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator

Summary

Nokogiri: Use-After-Free in Nokogiri when replacing an attribute value

Details

Summary

Nokogiri's CRuby native extension could leave a Ruby wrapper pointing to freed memory when replacing the value of an existing XML attribute via Nokogiri::XML::Node#[]= or Nokogiri::XML::Node#lang=. If Ruby code had already accessed the attribute's child nodes, replacing the value could free those native child nodes while their wrappers remained reachable. Using one of those child nodes afterwards could cause an invalid read and a possible segfault.

This is the same class of issue as GHSA-phwj-rprq-35pp, which was fixed for Attr#value= in Nokogiri 1.19.4.

Nokogiri 1.19.5 preserves all already-wrapped attribute child nodes before replacing the attribute value.

JRuby is not affected.

Severity

The Nokogiri maintainers have evaluated this as low severity. Reaching it requires an unusual API-usage pattern that does not arise during normal use. The application must directly access an attribute's child nodes and then replace that same attribute's value via Node#[]= or Node#lang=. Nokogiri 1.19.5 makes this pattern safe with no change to the public API.

Mitigation

Upgrade to Nokogiri 1.19.5 or later.

As a workaround, avoid accessing attribute child nodes directly via Attr#children or similar before replacing the same attribute's value.

Credit

This issue was responsibly reported by zx (@manus-pi).

Database specific

{
    "cwe_ids": [
        "CWE-416"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-11-10T20:51:19Z",
    "nvd_published_at": null,
    "severity": "LOW"
}

References

Affected packages

RubyGems / nokogiri

Package

Name: nokogiri
Purl: pkg:gem/nokogiri

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.19.5

Affected versions

1.*

1.0.0

1.0.1

1.0.2

1.0.3

1.0.4

1.0.5

1.0.6

1.0.7

1.1.0

1.1.1

1.2.0

1.2.1

1.2.2

1.2.3

1.3.0

1.3.1

1.3.2

1.3.3

1.4.0

1.4.1

1.4.2

1.4.2.1

1.4.3

1.4.3.1

1.4.4

1.4.4.1

1.4.4.2

1.4.5

1.4.6

1.4.7

1.5.0.beta.1

1.5.0.beta.2

1.5.0.beta.3

1.5.0.beta.4

1.5.0

1.5.1.rc1

1.5.1

1.5.2

1.5.3.rc2

1.5.3.rc3

1.5.3.rc4

1.5.3.rc5

1.5.3.rc6

1.5.3

1.5.4.rc1

1.5.4.rc2

1.5.4.rc3

1.5.4

1.5.5.rc1

1.5.5.rc2

1.5.5.rc3

1.5.5

1.5.6.rc1

1.5.6.rc2

1.5.6.rc3

1.5.6

1.5.7.rc1

1.5.7.rc2

1.5.7.rc3

1.5.7

1.5.8

1.5.9

1.5.10

1.5.11

1.6.0.rc1

1.6.0

1.6.1

1.6.2.rc1

1.6.2.rc2

1.6.2.rc3

1.6.2

1.6.2.1

1.6.3.rc1

1.6.3.rc2

1.6.3.rc3

1.6.3

1.6.3.1

1.6.4

1.6.4.1

1.6.5

1.6.6.1

1.6.6.2

1.6.6.3

1.6.6.4

1.6.7.rc2

1.6.7.rc3

1.6.7.rc4

1.6.7

1.6.7.1

1.6.7.2

1.6.8.rc1

1.6.8.rc2

1.6.8.rc3

1.6.8

1.6.8.1

1.7.0

1.7.0.1

1.7.1

1.7.2

1.8.0

1.8.1

1.8.2

1.8.3

1.8.4

1.8.5

1.9.0.rc1

1.9.0

1.9.1

1.10.0.rc1

1.10.0

1.10.1

1.10.2

1.10.3

1.10.4

1.10.5

1.10.6

1.10.7

1.10.8

1.10.9

1.10.10

1.11.0.rc1

1.11.0.rc2

1.11.0.rc3

1.11.0.rc4

1.11.0

1.11.1

1.11.2

1.11.3

1.11.4

1.11.5

1.11.6

1.11.7

1.12.0.rc1

1.12.0

1.12.1

1.12.2

1.12.3

1.12.4

1.12.5

1.13.0

1.13.1

1.13.2

1.13.3

1.13.4

1.13.5

1.13.6

1.13.7

1.13.8

1.13.9

1.13.10

1.14.0.rc1

1.14.0

1.14.1

1.14.2

1.14.3

1.14.4

1.14.5

1.15.0

1.15.1

1.15.2

1.15.3

1.15.4

1.15.5

1.15.6

1.15.7

1.16.0.rc1

1.16.0

1.16.1

1.16.2

1.16.3

1.16.4

1.16.5

1.16.6

1.16.7

1.16.8

1.17.0

1.17.1

1.17.2

1.18.0.rc1

1.18.0

1.18.1

1.18.2

1.18.3

1.18.4

1.18.5

1.18.6

1.18.7

1.18.8

1.18.9

1.18.10

1.19.0

1.19.1

1.19.2

1.19.3

1.19.4

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-3w22-6jfg-527w/GHSA-3w22-6jfg-527w.json"