CVE-2026-33176

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.

The following products are affected by CVE-2026-33176 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-33176.

URL	Resource
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
https://nvd.nist.gov/vuln/detail/CVE-2026-33176
https://www.cve.org/CVERecord?id=CVE-2026-33176