CVE-2026-33176
Severity CVSS v4.0:
MEDIUM
Type:
CWE-400
Uncontrolled Resource Consumption ('Resource Exhaustion')
Publication date:
24/03/2026
Last modified:
24/03/2026
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.
Impact
Base Score 4.0
6.60
Severity 4.0
MEDIUM
Base Score 3.x
7.50
Severity 3.x
HIGH
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:* | 7.2.3.1 (excluding) | |
| cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:* | 8.0.0 (including) | 8.0.4.1 (excluding) |
| cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:* | 8.1.0 (including) | 8.1.2.1 (excluding) |
To consult the complete list of CPE names with products and versions, see this page
References to Advisories, Solutions, and Tools
- https://github.com/rails/rails/commit/19dbab51ca086a657bb86458042bc44314916bcb
- https://github.com/rails/rails/commit/ebd6be18120d1136511eb516338e27af25ac0a1a
- https://github.com/rails/rails/commit/ee2c59e730e5b8faed502cd2c573109df093f856
- https://github.com/rails/rails/releases/tag/v7.2.3.1
- https://github.com/rails/rails/releases/tag/v8.0.4.1
- https://github.com/rails/rails/releases/tag/v8.1.2.1
- https://github.com/rails/rails/security/advisories/GHSA-2j26-frm8-cmj9