---
cve: "CVE-2026-73555"
severity: "MEDIUM"
cvss: 5.3
epss: "0.3%"
vendor: "vllm-project"
kev: false
exploited: false
published: "2026-08-13 15:20:17"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T10:59:02+02:00"
---

# CVE-2026-73555

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

vLLM is an inference and serving engine for large language models. Prior to 0.26.0, the validation_exception_handler in vllm/entrypoints/openai/server_utils.py converts FastAPI RequestValidationError objects with str(exc), and sanitize_message in vllm/entrypoints/utils.py does not remove traceback-style file paths, allowing unauthenticated malformed JSON requests to /v1/chat/completions, /v1/completions, /tokenize, and /detokenize to disclose the OS username, home and virtual-environment paths, Python version, internal package structure, line numbers, and endpoint handler names. This issue is fixed in version 0.26.0.

## CVSS-Vektor

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

| 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 | Gering | warn |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- e87521626febe2763f997691d1599de4175f4324 (Commit)
- ffd46bfab2128bb84146050e98b51a617c6575ab (Commit)

## Referenzen

- <https://github.com/vllm-project/vllm/security/advisories/GHSA-hwrm-c4cx-rf4j>
- <https://github.com/vllm-project/vllm/pull/46415>
- <https://github.com/vllm-project/vllm/commit/e87521626febe2763f997691d1599de4175f4324>
- <https://github.com/vllm-project/vllm/releases/tag/v0.26.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-73555) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_