CVE-2026-33176

7.5 HIGH
Published: March 24, 2026 Modified: March 24, 2026
View on NVD

Description

Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Support number helpers accept strings containing scientific notation (e.g. `1e10000`), which `BigDecimal` expands into extremely large decimal representations. This can cause excessive memory allocation and CPU consumption when the expanded number is formatted, possibly resulting in a DoS vulnerability. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/rails/rails/releases/tag/v7.2.3.1
Source: security-advisories@github.com
Release Notes
https://github.com/rails/rails/releases/tag/v8.0.4.1
Source: security-advisories@github.com
Release Notes
https://github.com/rails/rails/releases/tag/v8.1.2.1
Source: security-advisories@github.com
Release Notes
https://github.com/rails/rails/security/advisories/GHSA-2j26-frm8-cmj9
Source: security-advisories@github.com
Vendor Advisory

7 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.0%
6th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

rubyonrails