---
cve: "CVE-2026-73213"
severity: "MEDIUM"
cvss: 5.8
epss: "30%"
vendor: "coturn"
kev: false
exploited: false
published: "2026-08-11 18:18:26"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T09:38:19+02:00"
---

# CVE-2026-73213

> 5.8 MEDIUM · 🧪 PoC

## Beschreibung

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.16.0, addr_less_eq() in src/client/ns_turn_ioaddr.c uses a component-wise comparison for native IPv6 min-max intervals in ioa_addr_in_range(), allowing an authenticated TURN client to relay to an IPv6 peer that is numerically within a configured non-prefix-aligned denied-peer-ip range but is classified as outside it. This issue is fixed in version 4.16.0.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 6c13608c28a04af5d63abddd7565a0dcc4771c28 (Commit)
- ef409b4227ca16bdd23b3e3eba38530292c20773 (Commit)

## Referenzen

- <https://github.com/coturn/coturn/security/advisories/GHSA-4v97-rxjj-4f99>
- <https://github.com/coturn/coturn/commit/6c13608c28a04af5d63abddd7565a0dcc4771c28>
- <https://github.com/coturn/coturn/releases/tag/4.16.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-73213) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_