---
cve: "CVE-2026-33176"
severity: "MEDIUM"
cvss: 6.6
epss: "0.8%"
vendor: "rails"
kev: false
exploited: false
published: "2026-03-24 00:16:28"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T23:59:37+02:00"
---

# CVE-2026-33176

> 6.6 MEDIUM · 🧪 PoC

## Beschreibung

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-Vektor

```
CVSS: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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- ba76fca032a66f3716ca8a661c9ddb006acaf885 (Commit)
- a79efed95797b196575a98845dc989e3106a9acb (Commit)

## Referenzen

- <https://github.com/rails/rails/security/advisories/GHSA-2j26-frm8-cmj9>
- <https://github.com/rails/rails/commit/19dbab51ca086a657bb86458042bc44314916bcb>
- <https://github.com/rails/rails/commit/ebd6be18120d1136511eb516338e27af25ac0a1a>
- <https://github.com/rails/rails/commit/ee2c59e730e5b8faed502cd2c573109df093f856>
- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-33176) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_