CVE-2026-33169
Publication date 24 March 2026
Last updated 25 March 2026
Ubuntu priority
Description
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 versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, the interaction between the repeated lookahead group and `gsub!` can produce quadratic time complexity on long digit strings. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| rails | 25.10 questing |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Notes
seth-arnold
In Oneiric-Saucy, rails package is just for transition; The rails package contains actual code from vivid onward
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-33169
- https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11
- https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974
- https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49
- https://github.com/rails/rails/releases/tag/v7.2.3.1
- https://github.com/rails/rails/releases/tag/v8.0.4.1
- https://github.com/rails/rails/releases/tag/v8.1.2.1
- https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38