---
cve: "CVE-2026-49091"
severity: "HIGH"
cvss: 8.0
epss: "20%"
vendor: "Elastic"
kev: false
exploited: false
published: "2026-07-01 18:16:34"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-05T18:42:55+02:00"
---

# CVE-2026-49091

> 8.0 HIGH

## Beschreibung

Improper Output Neutralization for Logs (CWE-117) in Kibana can lead to log injection via Log Injection-Tampering-Forging (CAPEC-93). An attacker can supply specially crafted input that is written to log files without proper neutralization. When the log files are subsequently viewed in a terminal that interprets control sequences, the injected content may alter the displayed log data.

## CVSS-Vektor

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

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

## Schwachstellen-Klasse

- **CWE-117** — Improper Output Neutralization for Logs
  The product constructs a log message from external input, but it does not neutralize or incorrectly neutralizes special elements when the message is written to a log file.

## Angriffsmuster (CAPEC)

- [CAPEC-81 — Web Server Logs Tampering](https://capec.mitre.org/data/definitions/81.html) _(Severity: High)_
- [CAPEC-93 — Log Injection-Tampering-Forging](https://capec.mitre.org/data/definitions/93.html) _(Severity: High)_
- [CAPEC-268 — Audit Log Manipulation](https://capec.mitre.org/data/definitions/268.html)

## ATT&CK-Techniken

- [T1070 — Indicator Removal on Host](https://attack.mitre.org/techniques/T1070/)
- [T1562.002 — Impair Defenses: Disable Windows Event Logging](https://attack.mitre.org/techniques/T1562/002/)
- [T1562.003 — Impair Defenses: Impair Command History Logging](https://attack.mitre.org/techniques/T1562/003/)
- [T1562.008 — Impair Defenses: Disable Cloud Logs](https://attack.mitre.org/techniques/T1562/008/)

## Patch verfügbar (OSV)

- 0b8ecfb4378335f4689c4223d1f1115f16bef3ba (Commit)
- 6f9ff581fbcde658e6f69d6ce03050f060d1fd0c (Commit)

## Referenzen

- <https://discuss.elastic.co/t/kibana-7-17-15-8-11-1-security-update-esa-2026-53>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-49091) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_