CVE-2026-33169

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-33169
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.

5.3 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11 Patch
https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974 Patch
https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49 Patch
https://github.com/rails/rails/releases/tag/v7.2.3.1 Release Notes
https://github.com/rails/rails/releases/tag/v8.0.4.1 Release Notes
https://github.com/rails/rails/releases/tag/v8.1.2.1 Release Notes
https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38 Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
History

24 Mar 2026, 18:01

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.3
CPE cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
Summary
  • (es) Active Support es un conjunto de herramientas de bibliotecas de soporte y extensiones del núcleo de Ruby extraídas del framework Rails. 'NumberToDelimitedConverter' utiliza una expresión regular basada en lookahead con 'gsub!' para insertar delimitadores de millares. Antes de las versiones 8.1.2.1, 8.0.4.1 y 7.2.3.1, la interacción entre el grupo lookahead repetido y 'gsub!' puede producir una complejidad de tiempo cuadrática en cadenas de dígitos largas. Las versiones 8.1.2.1, 8.0.4.1 y 7.2.3.1 contienen un parche.
References () https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11 - () https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11 - Patch
References () https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974 - () https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974 - Patch
References () https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49 - () https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49 - Patch
References () https://github.com/rails/rails/releases/tag/v7.2.3.1 - () https://github.com/rails/rails/releases/tag/v7.2.3.1 - Release Notes
References () https://github.com/rails/rails/releases/tag/v8.0.4.1 - () https://github.com/rails/rails/releases/tag/v8.0.4.1 - Release Notes
References () https://github.com/rails/rails/releases/tag/v8.1.2.1 - () https://github.com/rails/rails/releases/tag/v8.1.2.1 - Release Notes
References () https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38 - () https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38 - Vendor Advisory
First Time Rubyonrails
Rubyonrails rails

24 Mar 2026, 00:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-24 00:16

Updated : 2026-03-24 18:01

NVD link : CVE-2026-33169

Mitre link : CVE-2026-33169

CVE.ORG link : CVE-2026-33169

JSON object : View

Products Affected

rubyonrails

  • rails
CWE
CWE-400

Uncontrolled Resource Consumption

CWE-1333

Inefficient Regular Expression Complexity