---
cve: "CVE-2026-77363"
severity: "HIGH"
cvss: 8.8
epss: "0.2%"
vendor: "The-40-Thieves"
kev: false
exploited: false
published: "2026-10-12 18:17:23"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-26T23:14:05+01:00"
---

# CVE-2026-77363

> 8.8 HIGH · 🧪 PoC

## Beschreibung

obsidian-tc HTTP transport lacks Origin/DNS-rebinding protection, enabling drive-by vault access on loopback

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2026-10-13 16:03:13
- CNA-CVSS: **8.8** (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

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

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

## Schwachstellen-Klasse

- **CWE-346** — Origin Validation Error
  The product does not properly verify that the source of data or communication is valid.
- **CWE-1385** — Missing Origin Validation in WebSockets
  The product uses a WebSocket, but it does not properly verify that the source of data or communication is valid.

## Angriffsmuster (CAPEC)

- [CAPEC-21 — Exploitation of Trusted Identifiers](https://capec.mitre.org/data/definitions/21.html) _(Severity: High)_
- [CAPEC-111 — JSON Hijacking (aka JavaScript Hijacking)](https://capec.mitre.org/data/definitions/111.html) _(Severity: High)_
- [CAPEC-141 — Cache Poisoning](https://capec.mitre.org/data/definitions/141.html) _(Severity: High)_
- [CAPEC-142 — DNS Cache Poisoning](https://capec.mitre.org/data/definitions/142.html) _(Severity: High)_
- [CAPEC-160 — Exploit Script-Based APIs](https://capec.mitre.org/data/definitions/160.html) _(Severity: Medium)_
- [CAPEC-384 — Application API Message Manipulation via Man-in-the-Middle](https://capec.mitre.org/data/definitions/384.html) _(Severity: Low)_
- [CAPEC-385 — Transaction or Event Tampering via Application API Manipulation](https://capec.mitre.org/data/definitions/385.html) _(Severity: Medium)_
- [CAPEC-386 — Application API Navigation Remapping](https://capec.mitre.org/data/definitions/386.html) _(Severity: Medium)_

## ATT&CK-Techniken

- [T1134 — Access Token Manipulation](https://attack.mitre.org/techniques/T1134/)
- [T1528 — Steal Application Access Token](https://attack.mitre.org/techniques/T1528/)
- [T1539 — Steal Web Session Cookie](https://attack.mitre.org/techniques/T1539/)
- [T1557.002 — Adversary-in-the-Middle: ARP Cache Poisoning](https://attack.mitre.org/techniques/T1557/002/)
- [T1584.002 — Compromise Infrastructure: DNS Server](https://attack.mitre.org/techniques/T1584/002/)

## Patch verfügbar (OSV)

- 3956ed5173ebde7864c7d576c259e9e747b11d76 (Commit)
- 6428bfe6fdfd43aa7b4b369be3aecd6a268fb928 (Commit)

## Referenzen

- <https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-pqh8-4pj7-32xx>
- <https://github.com/The-40-Thieves/obsidian-tc/pull/74>
- <https://github.com/The-40-Thieves/obsidian-tc/commit/6428bfe6fdfd43aa7b4b369be3aecd6a268fb928>
- <https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1>
- <https://nvd.nist.gov/vuln/detail/cve-2026-77363>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-77363/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_