---
cve: "CVE-2026-92917"
severity: "HIGH"
cvss: 8.7
epss: "0.5%"
vendor: "getgrav"
kev: false
exploited: false
published: "2026-09-17 12:18:30"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-11-06T05:20:59+01:00"
---

# CVE-2026-92917

> 8.7 HIGH · 🧪 PoC

## Beschreibung

Grav is a flat-file CMS. In versions 2.0.0-rc.1 through 2.0.21, the Twig content sandbox fails to restrict the dump and serialize filters (print_r, vardump, json_encode, yaml_encode, string): GravExtension::assertSandboxDumpSafe() determines sandbox state by calling SandboxExtension::isSandboxed() without a Source argument, which reports only the global sandbox flag that Grav never enables, so the guard added in GHSA-mc5q-6hpj-rp7j never executes. As a result, an authenticated user with page-edit rights can render {{ config|print_r }} in page content with Twig processing enabled and dump Grav's entire merged configuration — print_r reflects the real Config object held in a private property of the SandboxConfig facade, bypassing its path redaction — exposing plugin secrets such as SMTP credentials, API tokens, webhook secrets and cache backend passwords. Grav 1.7 is not affected because it ships no Twig content sandbox. The issue is fixed in 2.0.22, where the affected filters are registered with Twig's needs_is_sandboxed flag.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-09-19 02:16:41
- CNA-CVSS: **8.7** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **yes**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/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-200** — Exposure of Sensitive Information to an Unauthorized Actor
  The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

## Angriffsmuster (CAPEC)

- [CAPEC-13 — Subverting Environment Variable Values](https://capec.mitre.org/data/definitions/13.html) _(Severity: Very High)_
- [CAPEC-22 — Exploiting Trust in Client](https://capec.mitre.org/data/definitions/22.html) _(Severity: High)_
- [CAPEC-116 — Excavation](https://capec.mitre.org/data/definitions/116.html) _(Severity: Medium)_
- [CAPEC-169 — Footprinting](https://capec.mitre.org/data/definitions/169.html) _(Severity: Very Low)_
- [CAPEC-224 — Fingerprinting](https://capec.mitre.org/data/definitions/224.html) _(Severity: Very Low)_
- [CAPEC-285 — ICMP Echo Request Ping](https://capec.mitre.org/data/definitions/285.html) _(Severity: Low)_
- [CAPEC-287 — TCP SYN Scan](https://capec.mitre.org/data/definitions/287.html) _(Severity: Low)_
- [CAPEC-290 — Enumerate Mail Exchange (MX) Records](https://capec.mitre.org/data/definitions/290.html) _(Severity: Low)_

## 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/)
- [T1217 — Browser Bookmark Discovery](https://attack.mitre.org/techniques/T1217/)
- [T1592 — Gather Victim Host Information](https://attack.mitre.org/techniques/T1592/)
- [T1595 — Active Scanning](https://attack.mitre.org/techniques/T1595/)

## Patch verfügbar (OSV)

- bc216085962fb14054b0a8ad4a4e56906994fc4b (Commit)

## Referenzen

- <https://github.com/getgrav/grav/security/advisories/GHSA-rfr9-7h4p-gx2x>
- <https://www.vulncheck.com/advisories/grav-2.0.0-rc.1-through-2.0.21-configuration-disclosure-via-print-r>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-92917/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_