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CVE-2026-33176

Published: Mar 23, 2026

Modified: Mar 24, 2026

PUBLISHED

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.

Vendor	Product	Versions
rails	activesupport	affected `>= 8.1.0.beta1, < 8.1.2.1` affected `>= 8.0.0.beta1, < 8.0.4.1` affected `< 7.2.3.1`

Weaknesses (CWE)

References

https://github.com/rails/rails/security/advisories/GHSA-2j26-frm8-cmj9

x_refsource_CONFIRM

https://github.com/rails/rails/commit/19dbab51ca086a657bb86458042bc44314916bcb

x_refsource_MISC

https://github.com/rails/rails/commit/ebd6be18120d1136511eb516338e27af25ac0a1a

x_refsource_MISC

https://github.com/rails/rails/commit/ee2c59e730e5b8faed502cd2c573109df093f856

x_refsource_MISC

https://github.com/rails/rails/releases/tag/v7.2.3.1

x_refsource_MISC

https://github.com/rails/rails/releases/tag/v8.0.4.1

x_refsource_MISC

https://github.com/rails/rails/releases/tag/v8.1.2.1

x_refsource_MISC

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