Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Rubyonrails | Rails | < 7.2.3.1 |
Related Weaknesses (CWE)
References
- https://github.com/rails/rails/commit/19dbab51ca086a657bb86458042bc44314916bcbPatch
- https://github.com/rails/rails/commit/ebd6be18120d1136511eb516338e27af25ac0a1aPatch
- https://github.com/rails/rails/commit/ee2c59e730e5b8faed502cd2c573109df093f856Patch
- https://github.com/rails/rails/releases/tag/v7.2.3.1Release Notes
- https://github.com/rails/rails/releases/tag/v8.0.4.1Release Notes
- https://github.com/rails/rails/releases/tag/v8.1.2.1Release Notes
- https://github.com/rails/rails/security/advisories/GHSA-2j26-frm8-cmj9Vendor Advisory
FAQ
What is CVE-2026-33176?
CVE-2026-33176 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 stri...
How severe is CVE-2026-33176?
CVE-2026-33176 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33176?
Check the references section above for vendor advisories and patch information. Affected products include: Rubyonrails Rails.