CVE-2026-33176
Rails Active Support has a possible DoS vulnerability in its number helpers
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
4th
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.
| CWE | CWE-400 CWE-770 |
| Vendor | rails |
| Product | activesupport |
| Published | Mar 23, 2026 |
| Last Updated | Mar 24, 2026 |
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Affected Versions
rails / activesupport
>= 8.1.0.beta1, < 8.1.2.1 >= 8.0.0.beta1, < 8.0.4.1 < 7.2.3.1
References
github.com: https://github.com/rails/rails/security/advisories/GHSA-2j26-frm8-cmj9 github.com: https://github.com/rails/rails/commit/19dbab51ca086a657bb86458042bc44314916bcb github.com: https://github.com/rails/rails/commit/ebd6be18120d1136511eb516338e27af25ac0a1a github.com: https://github.com/rails/rails/commit/ee2c59e730e5b8faed502cd2c573109df093f856 github.com: https://github.com/rails/rails/releases/tag/v7.2.3.1 github.com: https://github.com/rails/rails/releases/tag/v8.0.4.1 github.com: https://github.com/rails/rails/releases/tag/v8.1.2.1