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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.

PUBLISHED Reserved 2026-03-17 | Published 2026-03-23 | Updated 2026-03-24 | Assigner GitHub_M




MEDIUM: 6.6CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

Problem types

CWE-400: Uncontrolled Resource Consumption

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

>= 8.1.0.beta1, < 8.1.2.1
affected

>= 8.0.0.beta1, < 8.0.4.1
affected

< 7.2.3.1
affected

References

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

github.com/...ommit/19dbab51ca086a657bb86458042bc44314916bcb

github.com/...ommit/ebd6be18120d1136511eb516338e27af25ac0a1a

github.com/...ommit/ee2c59e730e5b8faed502cd2c573109df093f856

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

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

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

cve.org (CVE-2026-33176)

nvd.nist.gov (CVE-2026-33176)

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