GHSA-v2fc-qm4h-8hqv

For applications that pass attacker-controlled input through XSLT.transform parameters, this may be a vector for a denial of service attack against long-running processes.

Mitigation

Upgrade to Nokogiri >= 1.19.3.

Users may also be able to mitigate this issue without upgrading by validating untrusted transform parameters before passing them to Nokogiri::XSLT::Stylesheet#transform.

Severity

The Nokogiri maintainers have evaluated this as Moderate Severity, CVSS 5.3.

Each leaked allocation is approximately 24–32 bytes, so meaningful memory growth requires sustained attacker-controlled traffic at high call rates. The bug does not cause memory corruption, information disclosure, or any change in the behavior of the transform itself, and the string-handling exception is raised as expected.

Applications that do not pass raw attacker-controlled bytes to XSLT parameters are unlikely to be affected in practice.

Resources

CWE-401: Missing Release of Memory after Effective Lifetime

Credit

This vulnerability was responsibly reported by @Captainjack-kor.

Database specific

{
    "cwe_ids": [
        "CWE-401"
    ],
    "github_reviewed_at": "2026-05-06T18:27:38Z",
    "github_reviewed": true,
    "severity": "MODERATE",
    "nvd_published_at": null
}

References

Affected packages

RubyGems / nokogiri

Package

Name: nokogiri
Purl: pkg:gem/nokogiri

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.19.3

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

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-v2fc-qm4h-8hqv/GHSA-v2fc-qm4h-8hqv.json"