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VULNERABILITIES

CVE-2026-33169 Details

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

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11 [email protected]Patch
https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974 [email protected]Patch
https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49 [email protected]Patch
https://github.com/rails/rails/releases/tag/v7.2.3.1 [email protected]Release Notes
https://github.com/rails/rails/releases/tag/v8.0.4.1 [email protected]Release Notes

see all 7 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-1333Inefficient Regular Expression Complexity[email protected]
CWE-400Uncontrolled Resource Consumption[email protected]

Affected Products

ProductVersions
rubyonrails rails
< 7.2.3.1
>= 8.0.0, < 8.0.4.1
>= 8.1.0, < 8.1.2.1

CPE

  • cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-33169
NVD Published Date:
Mar 24, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-33169 Details - Not Deferred