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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-33169 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
CVSS-B 6.9 MEDIUM
Vector:  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

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11 GitHub, Inc.
https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974 GitHub, Inc.
https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49 GitHub, Inc.
https://github.com/rails/rails/releases/tag/v7.2.3.1 GitHub, Inc.
https://github.com/rails/rails/releases/tag/v8.0.4.1 GitHub, Inc.
https://github.com/rails/rails/releases/tag/v8.1.2.1 GitHub, Inc.
https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38 GitHub, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-400 Uncontrolled Resource Consumption GitHub, Inc.  
CWE-1333 Inefficient Regular Expression Complexity GitHub, Inc.  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-33169
NVD Published Date:
03/23/2026
NVD Last Modified:
03/23/2026
Source:
GitHub, Inc.