---
cve: "CVE-2026-45808"
severity: "HIGH"
cvss: 7.1
epss: "31%"
vendor: "openbao"
kev: false
exploited: false
published: "2026-08-07 22:16:58"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T05:39:51+02:00"
---

# CVE-2026-45808

> 7.1 HIGH · 🧪 PoC

## Beschreibung

OpenBao is an open source identity-based secrets management system. Prior to version 2.5.4, OpenBao's namespaces provide multi-tenant separation. A tenant who intentionally leaks lease identifiers can have their lease and underlying credential revoked or renewed by a user in another tenant via the legacy, undocumented `sys/revoke` and `sys/renew` endpoints. This is fixed in OpenBao v2.5.4.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- c0495646b41cea0e3f5a1030132e9cf5c2375b5c (Commit)
- 4f6d47246a053375271a5fd8af85c3b75695aa46 (Commit)

## Referenzen

- <https://github.com/openbao/openbao/security/advisories/GHSA-v8v8-cm84-m686>
- <https://github.com/openbao/openbao/pull/3152>
- <https://github.com/openbao/openbao/commit/c0495646b41cea0e3f5a1030132e9cf5c2375b5c>
- <https://github.com/openbao/openbao/releases/tag/v2.5.4>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-45808) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_