---
cve: "CVE-2026-77584"
severity: "HIGH"
cvss: 7.0
epss: "0.2%"
vendor: "torproject"
kev: false
exploited: false
published: "2026-08-20 21:17:10"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T05:35:55+02:00"
---

# CVE-2026-77584

> 7.0 HIGH

## Beschreibung

Tor before 0.4.9.10 did not reject a CONFLUX_LINK cell that arrives on a circuit which already has attached streams. A malicious client could send a RELAY_COMMAND_BEGIN before the CONFLUX_LINK on the same circuit, attaching an exit stream that would later end up orphan leaving a dangling circuit back-pointer and a use-after-free (UAF) when the circuit is freed. This is TROVE-2026-025.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/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 | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- 65d8b117079fa0782ea9ca189dbb998376d08389 (Commit)

## Referenzen

- <https://gitlab.torproject.org/tpo/core/tor/-/raw/tor-0.4.9.10/ChangeLog>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-77584) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_