Resource exhaustion in Rails Activesupport
CVE-2026-33169
Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. `NumberToDelimitedConverter` uses a lookahead-based regular expression with `gsub!` to insert thousands delimiters. Prior to vers…
Vulnerability class: DoS (Denial of Service)
EPSS: 0.000 (6.1th percentile) — read the EPSS interpretation.
Affected products
- Rails Activesupport — versions >= 8.1.0.beta1, < 8.1.2.1, >= 8.0.0.beta1, < 8.0.4.1, < 7.2.3.1
Weakness classification (CWE)
References
- https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38 (x_refsource_CONFIRM)
- https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11 (x_refsource_MISC)
- https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974 (x_refsource_MISC)
- https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49 (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)