CVE catalog

CVE-2026-57235

Nokogiri is an open source XML and HTML library for…

[CVE catalog]

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::NodeSet#[] (and its alias #slice) checked the requested index against the node set's bounds using a 32-bit-truncated copy of the index. A large negative index could pass the check and then be used at full width, reading outside the node set's storage. On CRuby this is an out-of-bounds read that typically crashes the process; on JRuby it is not memory-unsafe but returns an incorrect node. This vulnerability is fixed in 1.19.4.

Severity
Medium · CVSS 6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
Source
[NVD] · [CVE record]
EPSS
0.43% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [
    {
      "name": "ruby-nokogiri",
      "status": "fixed",
      "release": "sid",
      "version": "1.19.4+dfsg-1"
    },
    {
      "name": "ruby-nokogiri",
      "status": "fixed",
      "release": "forky",
      "version": "1.19.4+dfsg-1"
    },
    {
      "name": "ruby-nokogiri",
      "status": "vulnerable",
      "release": "trixie",
      "version": "1.18.2+dfsg-1"
    },
    {
      "name": "ruby-nokogiri",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "1.13.10+dfsg-2"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1140769,
      "name": "ruby-nokogiri",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "1.19.4+dfsg-1"
    },
    {
      "bug": 1140769,
      "name": "ruby-nokogiri",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "1.19.4+dfsg-1"
    },
    {
      "bug": 1140769,
      "name": "ruby-nokogiri",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1140769,
      "name": "ruby-nokogiri",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "ruby-nokogiri",
      "ecosystem": "cpe",
      "fixed_version": "not yet fixed"
    },
    {
      "name": "nokogiri",
      "ecosystem": "cpe",
      "fixed_version": "1.19.4"
    },
    {
      "name": "nokogiri",
      "ranges": [
        {
          "fixed": "1.19.4",
          "introduced": "",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "1.19.4",
      "provider_record_id": "NVD-CVE-2026-57235"
    }
  ]
}

[Debian bug #1140769]

Publisher notes

[trixie] ruby-nokogiri: Minor issue [bookworm] ruby-nokogiri: Minor issue

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [ruby-nokogiri]Unknown

    Source package: [ruby-nokogiri]

    Details (2)

    • 1.13.10+dfsg-2+b1 · amd64 · bookworm

      Affected

      nvd · ruby-nokogiri · debian · bookworm; nvd · ruby-nokogiri · debian · 12

    • 1.13.10+dfsg-2+b1 · arm64 · bookworm

      Affected

      nvd · ruby-nokogiri · debian · bookworm; nvd · ruby-nokogiri · debian · 12

[Debian 13 (Trixie)]

  • [ruby-nokogiri]Unknown

    Source package: [ruby-nokogiri]

    Details (2)

    • 1.18.2+dfsg-1+b1 · amd64 · trixie

      Affected

      nvd · ruby-nokogiri · debian · 13

    • 1.18.2+dfsg-1+b1 · arm64 · trixie

      Affected

      nvd · ruby-nokogiri · debian · 13

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]