---
cve: "CVE-2026-77638"
severity: "HIGH"
cvss: 8.9
epss: "17%"
vendor: "torproject"
kev: false
exploited: false
published: "2026-08-20 21:17:11"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-19T04:52:17+02:00"
---

# CVE-2026-77638

> 8.9 HIGH

## Beschreibung

Tor before 0.4.9.11 is prone to a race condition where in just the right circumstances a rendezvous point could man-in-the-middle (impersonate) the onion service that the client was trying to reach.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- f3d28b2e0978ca075ec324834bec077673478ded (Commit)

## Referenzen

- <https://gitlab.torproject.org/tpo/core/tor/-/raw/tor-0.4.9.11/ChangeLog>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-77638) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_