---
cve: "CVE-2025-59043"
severity: "HIGH"
cvss: 7.5
epss: "65%"
vendor: "openbao"
kev: false
exploited: false
published: "2025-10-17 16:03:23"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-16T10:29:42+02:00"
---

# CVE-2025-59043

> 7.5 HIGH · 🧪 PoC

## Beschreibung

OpenBao is an open source identity-based secrets management system. In OpenBao versions prior to 2.4.1, JSON objects after decoding may use significantly more memory than their serialized version. It is possible to craft a JSON payload to maximize the factor between serialized memory usage and deserialized memory usage, similar to a zip bomb, with factors reaching approximately 35. This can be used to circumvent the max_request_size configuration parameter which is intended to protect against denial of service attacks. The request body is parsed into a map very early in the request handling chain before authentication, which means an unauthenticated attacker can send a specifically crafted JSON object and cause an out-of-memory crash. Additionally, for requests with large numbers of strings, the audit subsystem can consume large quantities of CPU. The vulnerability is fixed in version 2.4.1.

## CVSS-Vektor

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

## Patch verfügbar (OSV)

- efb9efa12f550e8322f3cec040862355e966f565 (Commit)
- d418f238bc99adc72c73109faf574cc2b672880c (Commit)

## Referenzen

- <https://github.com/openbao/openbao/security/advisories/GHSA-g46h-2rq9-gw5m>
- <https://github.com/openbao/openbao/pull/1756>
- <https://github.com/openbao/openbao/commit/d418f238bc99adc72c73109faf574cc2b672880c>
- <https://github.com/openbao/openbao/blob/788536bd3e10818a7b4fb00aac6affc23388e5a9/http/logical.go#L50>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-59043) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_