---
cve: "CVE-2026-116822"
severity: "MEDIUM"
cvss: 6.9
epss: ""
vendor: "YesWiki"
kev: false
exploited: false
published: "2026-10-27 00:17:17"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-27T10:35:03+01:00"
---

# CVE-2026-116822

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

YesWiki before 4.7.0 contains a path traversal vulnerability in BazarListeAction that allows unauthenticated attackers to select arbitrary templates within the @bazar Twig namespace via the template GET parameter. Attackers can append crafted template values to pages containing the bazarliste action to force unintended layouts, causing page defacement for visitors following the crafted link.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-10-26 23:05:48
- CNA-CVSS: **6.9** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N`)

## CVSS-Vektor

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

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

## Schwachstellen-Klasse

- **CWE-73** — External Control of File Name or Path
  The product allows user input to control or influence paths or file names that are used in filesystem operations.

## Angriffsmuster (CAPEC)

- [CAPEC-13 — Subverting Environment Variable Values](https://capec.mitre.org/data/definitions/13.html) _(Severity: Very High)_
- [CAPEC-64 — Using Slashes and URL Encoding Combined to Bypass Validation Logic](https://capec.mitre.org/data/definitions/64.html) _(Severity: High)_
- [CAPEC-72 — URL Encoding](https://capec.mitre.org/data/definitions/72.html) _(Severity: High)_
- [CAPEC-76 — Manipulating Web Input to File System Calls](https://capec.mitre.org/data/definitions/76.html) _(Severity: Very High)_
- [CAPEC-78 — Using Escaped Slashes in Alternate Encoding](https://capec.mitre.org/data/definitions/78.html) _(Severity: High)_
- [CAPEC-79 — Using Slashes in Alternate Encoding](https://capec.mitre.org/data/definitions/79.html) _(Severity: High)_
- [CAPEC-80 — Using UTF-8 Encoding to Bypass Validation Logic](https://capec.mitre.org/data/definitions/80.html) _(Severity: High)_
- [CAPEC-267 — Leverage Alternate Encoding](https://capec.mitre.org/data/definitions/267.html) _(Severity: High)_

## ATT&CK-Techniken

- [T1562.003 — Impair Defenses:Impair Command History Logging](https://attack.mitre.org/techniques/T1562/003/)
- [T1574.006 — Hijack Execution Flow:Dynamic Linker Hijacking](https://attack.mitre.org/techniques/T1574/006/)
- [T1574.007 — Hijack Execution Flow:Path Interception by PATH Environment ](https://attack.mitre.org/techniques/T1574/007/)
- [T1027 — Obfuscated Files or Information](https://attack.mitre.org/techniques/T1027/)

## Referenzen

- <https://github.com/YesWiki/yeswiki/security/advisories/GHSA-qfv2-x8g4-qg27>
- <https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-template-traversal-via-bazarlisteaction-template-parameter>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-116822/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_