---
cve: "CVE-2026-77642"
severity: "HIGH"
cvss: 7.5
epss: "0.2%"
vendor: "torproject"
kev: false
exploited: false
published: "2026-08-20 22:18:06"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T17:21:57+02:00"
---

# CVE-2026-77642

> 7.5 HIGH

## Beschreibung

tor before 0.4.9.9 was prone to an out-of-bounds write when parsing a consensus or  detached signature with unexpected signature digest type. Impact  is minor for most Tor roles, but potentially major for directory   authorities. This is TROVE-2026-019.

## CVSS-Vektor

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

| 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 | Keine | good |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 74b53bd1992da4eca7a89668d9a1a040faff7a73 (Commit)

## Referenzen

- <https://gitlab.torproject.org/tpo/core/tor/-/raw/tor-0.4.9.9/ChangeLog>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-77642) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_