---
cve: "CVE-2026-45393"
severity: "HIGH"
cvss: 8.5
epss: "22%"
vendor: "Cribl"
kev: false
exploited: false
published: "2026-05-12 02:16:13"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T22:14:46+02:00"
---

# CVE-2026-45393

> 8.5 HIGH

## Beschreibung

A vulnerability chain in Cribl Edge for Windows before 4.17.1 allows a local authenticated user to escalate privileges to NT AUTHORITY\SYSTEM. Incorrect default permissions on the Windows installer's authentication directory (CWE-276) expose a cryptographic secret used for JWT signing and password-hash derivation, enabling forgery of administrative API tokens. The forged token can then be used to invoke a pipeline function that reaches an OS command sink (CWE-78) running in the SYSTEM context.

## CVSS-Vektor

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

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

## Schwachstellen-Klasse

- **CWE-276** — Incorrect Default Permissions
  During installation, installed file permissions are set to allow anyone to modify those files.
- **CWE-78** — Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
  The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

## Angriffsmuster (CAPEC)

- [CAPEC-1 — Accessing Functionality Not Properly Constrained by ACLs](https://capec.mitre.org/data/definitions/1.html) _(Severity: High)_
- [CAPEC-81 — Web Server Logs Tampering](https://capec.mitre.org/data/definitions/81.html) _(Severity: High)_
- [CAPEC-127 — Directory Indexing](https://capec.mitre.org/data/definitions/127.html) _(Severity: Medium)_

## ATT&CK-Techniken

- [T1574.010 — Hijack Execution Flow: ServicesFile Permissions Weakness](https://attack.mitre.org/techniques/T1574/010/)
- [T1083 — File and Directory Discovery](https://attack.mitre.org/techniques/T1083/)

## Referenzen

- <https://docs.cribl.io/edge/release-notes/release-v4171#security-fixes>
- <https://trust.cribl.io/notifications>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-45393) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_