GHSA-5v8h-3h3q-446p

Source

https://github.com/advisories/GHSA-5v8h-3h3q-446p

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-5v8h-3h3q-446p/GHSA-5v8h-3h3q-446p.json

JSON Data

https://api.test.osv.dev/v1/vulns/GHSA-5v8h-3h3q-446p

Aliases

CVE-2026-57236

Downstream

CGA (118)

MINI (8)

Published

2026-06-19T16:35:58Z

Modified

2026-07-17T21:10:27Z

Severity

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

Summary

Nokogiri: Possible Use-After-Free when `Nokogiri::XML::Document#encoding=` raises an exception

Details

Summary

Calling Document#encoding= with an invalid encoding (e.g., a non-string, or a string containing a null byte) raises an exception, but only after freeing the document's current encoding string without replacing it. The document is left referencing freed memory, so the next call to Document#encoding reads invalid memory, which can cause a segfault or leak freed bytes into a Ruby String.

Affects the CRuby (libxml2) implementation only; 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 pass an invalid encoding to Document#encoding=, rescue the resulting exception, and then continue using the same document. Nokogiri 1.19.4 makes this pattern safe with no change to the public API. The document no longer references freed memory after the exception is raised.

Mitigation

Upgrade to Nokogiri 1.19.4 or later.

If users are unable to upgrade, avoid passing attacker-controlled values to Document#encoding=. Applications that only assign developer-authored encodings are not directly exposed.

Credit

This issue was responsibly reported by Zheng Yu from depthfirst.com.

Database specific

{
    "cwe_ids": [
        "CWE-416"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-19T16:35:58Z",
    "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

1.19.4

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

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-5v8h-3h3q-446p/GHSA-5v8h-3h3q-446p.json"