Rails Active Support has a possible ReDoS vulnerability in number_to_delimited (rails activesupport)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.66 % · percentile 51 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Analyzed
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.
Weaknesses (CWE)
References
- https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38
- 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
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | MEDIUM 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | GitHub_M |
| CVSS 4.0 | MEDIUM 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | NVD · nvd@nist.gov (Primary) |
Advisories
- GHSA-cg4j-q9v8-6v38 — Rails Active Support has a possible ReDoS vulnerability in number_to_delimited
European references
- ENISA EUVD · EUVD-2026-14622
- GCVE · GCVE-0-2026-33169
CERT-FR advisories
- CERTFR-2026-AVI-0349 — Multiples vulnérabilités dans Ruby on Rails · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*< 7.2.3.1cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*≥ 8.0.0 < 8.0.4.1cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*≥ 8.1.0 < 8.1.2.1
Affected products
| Product | Versions |
|---|---|
| rails · activesupport | affected >= 8.1.0.beta1, < 8.1.2.1 ; affected >= 8.0.0.beta1, < 8.0.4.1 ; affected < 7.2.3.1 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |