ubuntu-cve-2026-33169
Vulnerability from osv_ubuntu
Published
2026-03-24 00:16
Modified
2026-05-20 15:27
Summary
Details
Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. NumberToDelimitedConverter uses a lookahead-based regular expression with gsub! to insert thousands delimiters. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, the interaction between the repeated lookahead group and gsub! can produce quadratic time complexity on long digit strings. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
Severity
5.3 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rails",
"binary_version": "2:4.2.6-1ubuntu0.1~esm2"
},
{
"binary_name": "ruby-actionmailer",
"binary_version": "2:4.2.6-1ubuntu0.1~esm2"
},
{
"binary_name": "ruby-actionpack",
"binary_version": "2:4.2.6-1ubuntu0.1~esm2"
},
{
"binary_name": "ruby-actionview",
"binary_version": "2:4.2.6-1ubuntu0.1~esm2"
},
{
"binary_name": "ruby-activejob",
"binary_version": "2:4.2.6-1ubuntu0.1~esm2"
},
{
"binary_name": "ruby-activemodel",
"binary_version": "2:4.2.6-1ubuntu0.1~esm2"
},
{
"binary_name": "ruby-activerecord",
"binary_version": "2:4.2.6-1ubuntu0.1~esm2"
},
{
"binary_name": "ruby-activesupport",
"binary_version": "2:4.2.6-1ubuntu0.1~esm2"
},
{
"binary_name": "ruby-rails",
"binary_version": "2:4.2.6-1ubuntu0.1~esm2"
},
{
"binary_name": "ruby-railties",
"binary_version": "2:4.2.6-1ubuntu0.1~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "rails",
"purl": "pkg:deb/ubuntu/rails@2:4.2.6-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:4.1.10-1",
"2:4.2.5-1",
"2:4.2.5.1-1",
"2:4.2.5.2-2",
"2:4.2.6-1",
"2:4.2.6-1ubuntu0.1~esm1",
"2:4.2.6-1ubuntu0.1~esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rails",
"binary_version": "2:4.2.10-0ubuntu4+esm2"
},
{
"binary_name": "ruby-actionmailer",
"binary_version": "2:4.2.10-0ubuntu4+esm2"
},
{
"binary_name": "ruby-actionpack",
"binary_version": "2:4.2.10-0ubuntu4+esm2"
},
{
"binary_name": "ruby-actionview",
"binary_version": "2:4.2.10-0ubuntu4+esm2"
},
{
"binary_name": "ruby-activejob",
"binary_version": "2:4.2.10-0ubuntu4+esm2"
},
{
"binary_name": "ruby-activemodel",
"binary_version": "2:4.2.10-0ubuntu4+esm2"
},
{
"binary_name": "ruby-activerecord",
"binary_version": "2:4.2.10-0ubuntu4+esm2"
},
{
"binary_name": "ruby-activesupport",
"binary_version": "2:4.2.10-0ubuntu4+esm2"
},
{
"binary_name": "ruby-rails",
"binary_version": "2:4.2.10-0ubuntu4+esm2"
},
{
"binary_name": "ruby-railties",
"binary_version": "2:4.2.10-0ubuntu4+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "rails",
"purl": "pkg:deb/ubuntu/rails@2:4.2.10-0ubuntu4+esm2?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:4.2.9-2",
"2:4.2.9-4",
"2:4.2.10-0ubuntu4",
"2:4.2.10-0ubuntu4+esm1",
"2:4.2.10-0ubuntu4+esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rails",
"binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
},
{
"binary_name": "ruby-actioncable",
"binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
},
{
"binary_name": "ruby-actionmailer",
"binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
},
{
"binary_name": "ruby-actionpack",
"binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
},
{
"binary_name": "ruby-actionview",
"binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
},
{
"binary_name": "ruby-activejob",
"binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
},
{
"binary_name": "ruby-activemodel",
"binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
},
{
"binary_name": "ruby-activerecord",
"binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
},
{
"binary_name": "ruby-activestorage",
"binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
},
{
"binary_name": "ruby-activesupport",
"binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
},
{
"binary_name": "ruby-rails",
"binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
},
{
"binary_name": "ruby-railties",
"binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "rails",
"purl": "pkg:deb/ubuntu/rails@2:5.2.3+dfsg-3ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:5.2.2.1+dfsg-1ubuntu1",
"2:5.2.3+dfsg-3",
"2:5.2.3+dfsg-3ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rails",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
},
{
"binary_name": "ruby-actioncable",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
},
{
"binary_name": "ruby-actionmailbox",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
},
{
"binary_name": "ruby-actionmailer",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
},
{
"binary_name": "ruby-actionpack",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
},
{
"binary_name": "ruby-actiontext",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
},
{
"binary_name": "ruby-actionview",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
},
{
"binary_name": "ruby-activejob",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
},
{
"binary_name": "ruby-activemodel",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
},
{
"binary_name": "ruby-activerecord",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
},
{
"binary_name": "ruby-activestorage",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
},
{
"binary_name": "ruby-activesupport",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
},
{
"binary_name": "ruby-rails",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
},
{
"binary_name": "ruby-railties",
"binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "rails",
"purl": "pkg:deb/ubuntu/rails@2:6.1.4.1+dfsg-8ubuntu2+esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:6.0.3.7+dfsg-2",
"2:6.1.4.1+dfsg-8ubuntu2",
"2:6.1.4.1+dfsg-8ubuntu2+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rails",
"binary_version": "2:6.1.7.3+dfsg-3"
},
{
"binary_name": "ruby-actioncable",
"binary_version": "2:6.1.7.3+dfsg-3"
},
{
"binary_name": "ruby-actionmailbox",
"binary_version": "2:6.1.7.3+dfsg-3"
},
{
"binary_name": "ruby-actionmailer",
"binary_version": "2:6.1.7.3+dfsg-3"
},
{
"binary_name": "ruby-actionpack",
"binary_version": "2:6.1.7.3+dfsg-3"
},
{
"binary_name": "ruby-actiontext",
"binary_version": "2:6.1.7.3+dfsg-3"
},
{
"binary_name": "ruby-actionview",
"binary_version": "2:6.1.7.3+dfsg-3"
},
{
"binary_name": "ruby-activejob",
"binary_version": "2:6.1.7.3+dfsg-3"
},
{
"binary_name": "ruby-activemodel",
"binary_version": "2:6.1.7.3+dfsg-3"
},
{
"binary_name": "ruby-activerecord",
"binary_version": "2:6.1.7.3+dfsg-3"
},
{
"binary_name": "ruby-activestorage",
"binary_version": "2:6.1.7.3+dfsg-3"
},
{
"binary_name": "ruby-activesupport",
"binary_version": "2:6.1.7.3+dfsg-3"
},
{
"binary_name": "ruby-rails",
"binary_version": "2:6.1.7.3+dfsg-3"
},
{
"binary_name": "ruby-railties",
"binary_version": "2:6.1.7.3+dfsg-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "rails",
"purl": "pkg:deb/ubuntu/rails@2:6.1.7.3+dfsg-3?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:6.1.7.3+dfsg-2build1",
"2:6.1.7.3+dfsg-3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rails",
"binary_version": "2:7.2.2.1+dfsg-7"
},
{
"binary_name": "ruby-actioncable",
"binary_version": "2:7.2.2.1+dfsg-7"
},
{
"binary_name": "ruby-actionmailbox",
"binary_version": "2:7.2.2.1+dfsg-7"
},
{
"binary_name": "ruby-actionmailer",
"binary_version": "2:7.2.2.1+dfsg-7"
},
{
"binary_name": "ruby-actionpack",
"binary_version": "2:7.2.2.1+dfsg-7"
},
{
"binary_name": "ruby-actiontext",
"binary_version": "2:7.2.2.1+dfsg-7"
},
{
"binary_name": "ruby-actionview",
"binary_version": "2:7.2.2.1+dfsg-7"
},
{
"binary_name": "ruby-activejob",
"binary_version": "2:7.2.2.1+dfsg-7"
},
{
"binary_name": "ruby-activemodel",
"binary_version": "2:7.2.2.1+dfsg-7"
},
{
"binary_name": "ruby-activerecord",
"binary_version": "2:7.2.2.1+dfsg-7"
},
{
"binary_name": "ruby-activestorage",
"binary_version": "2:7.2.2.1+dfsg-7"
},
{
"binary_name": "ruby-activesupport",
"binary_version": "2:7.2.2.1+dfsg-7"
},
{
"binary_name": "ruby-rails",
"binary_version": "2:7.2.2.1+dfsg-7"
},
{
"binary_name": "ruby-railties",
"binary_version": "2:7.2.2.1+dfsg-7"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "rails",
"purl": "pkg:deb/ubuntu/rails@2:7.2.2.1+dfsg-7?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:6.1.7.3+dfsg-7",
"2:7.2.2.1+dfsg-7"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rails",
"binary_version": "2:7.2.3+dfsg-2"
},
{
"binary_name": "ruby-actioncable",
"binary_version": "2:7.2.3+dfsg-2"
},
{
"binary_name": "ruby-actionmailbox",
"binary_version": "2:7.2.3+dfsg-2"
},
{
"binary_name": "ruby-actionmailer",
"binary_version": "2:7.2.3+dfsg-2"
},
{
"binary_name": "ruby-actionpack",
"binary_version": "2:7.2.3+dfsg-2"
},
{
"binary_name": "ruby-actiontext",
"binary_version": "2:7.2.3+dfsg-2"
},
{
"binary_name": "ruby-actionview",
"binary_version": "2:7.2.3+dfsg-2"
},
{
"binary_name": "ruby-activejob",
"binary_version": "2:7.2.3+dfsg-2"
},
{
"binary_name": "ruby-activemodel",
"binary_version": "2:7.2.3+dfsg-2"
},
{
"binary_name": "ruby-activerecord",
"binary_version": "2:7.2.3+dfsg-2"
},
{
"binary_name": "ruby-activestorage",
"binary_version": "2:7.2.3+dfsg-2"
},
{
"binary_name": "ruby-activesupport",
"binary_version": "2:7.2.3+dfsg-2"
},
{
"binary_name": "ruby-rails",
"binary_version": "2:7.2.3+dfsg-2"
},
{
"binary_name": "ruby-railties",
"binary_version": "2:7.2.3+dfsg-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "rails",
"purl": "pkg:deb/ubuntu/rails@2:7.2.3+dfsg-2?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:7.2.2.1+dfsg-7",
"2:7.2.2.2+dfsg-2",
"2:7.2.3+dfsg-2"
]
}
],
"aliases": [],
"details": "Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. `NumberToDelimitedConverter` uses a lookahead-based regular expression with `gsub!` to insert thousands delimiters. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, the interaction between the repeated lookahead group and `gsub!` can produce quadratic time complexity on long digit strings. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.",
"id": "UBUNTU-CVE-2026-33169",
"modified": "2026-05-20T15:27:21Z",
"published": "2026-03-24T00:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-33169"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-33169"
},
{
"type": "REPORT",
"url": "https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11"
},
{
"type": "REPORT",
"url": "https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974"
},
{
"type": "REPORT",
"url": "https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49"
},
{
"type": "REPORT",
"url": "https://github.com/rails/rails/releases/tag/v7.2.3.1"
},
{
"type": "REPORT",
"url": "https://github.com/rails/rails/releases/tag/v8.0.4.1"
},
{
"type": "REPORT",
"url": "https://github.com/rails/rails/releases/tag/v8.1.2.1"
},
{
"type": "REPORT",
"url": "https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-33169"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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