Skip to content
CVE PROGRAM SOURCE RECORD6.6 Medium

CVE-2026-33176

Rails Active Support has a possible DoS vulnerability in its number helpers

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

rails activesupport

  • >= 8.1.0.beta1, < 8.1.2.1affected
  • >= 8.0.0.beta1, < 8.0.4.1affected
  • < 7.2.3.1affected

References