---
cve: "CVE-2026-39934"
severity: "MEDIUM"
cvss: 6.9
epss: "0.3%"
vendor: "The Wikimedia Foundation"
kev: false
exploited: false
published: "2026-04-07 22:16:24"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T09:18:53+02:00"
---

# CVE-2026-39934

> 6.9 MEDIUM

## Beschreibung

Loop with unreachable exit condition ('infinite loop') vulnerability in The Wikimedia Foundation Mediawiki - GrowthExperiments Extension allows Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions. This issue was remediated only on the `master` branch.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
```

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

## Referenzen

- <https://phabricator.wikimedia.org/T418222>
- <https://gerrit.wikimedia.org/r/c/1243874>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-39934) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_