---
cve: "CVE-2026-56207"
severity: "CRITICAL"
cvss: 9.8
epss: "0.5%"
vendor: "Apache Software Foundation"
kev: false
exploited: false
published: "2026-09-09 10:36:55"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-09T13:45:42+02:00"
---

# CVE-2026-56207

> 9.8 CRITICAL

## Beschreibung

Signature of Bearer token is not verified in last step of SAML2 authentication for Impala's hs2-http interface, allowing altering user name and acting as another user.



This issue affects Apache Impala: >=4.0.0.



Users are recommended to upgrade to version 4.5.2, which fixes this issue.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **yes**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 078470bb0471336fa7715cf9b72a5d713fd2751d (Commit)

## Referenzen

- <https://lists.apache.org/thread/20cov78py0zqzx7dyq39ktythkwn91zs>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-56207/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_