---
cve: "CVE-2026-44513"
severity: "HIGH"
cvss: 8.8
epss: "1.1%"
vendor: "huggingface"
kev: false
exploited: false
published: "2026-05-14 17:16:22"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-02T21:12:12+02:00"
---

# CVE-2026-44513

> 8.8 HIGH · 🧪 PoC

## Beschreibung

Diffusers is the a library for  pretrained diffusion models. Prior to 0.38.0, a trust_remote_code bypass in DiffusionPipeline.from_pretrained allows arbitrary remote code execution despite the user passing trust_remote_code=False (or omitting it, which is the default). The vulnerability has three variants, all sharing the same root cause — the trust_remote_code gate was implemented inside DiffusionPipeline.download() rather than at the actual dynamic-module load site, so any code path that bypassed or short-circuited download() also bypassed the security check. DiffusionPipeline.from_pretrained('repoA', custom_pipeline='attacker/repoB', trust_remote_code=False) — the gate evaluated against repoA's file list rather than repoB's, so repoB's pipeline.py was loaded and executed. DiffusionPipeline.from_pretrained('/local/snapshot', custom_pipeline='attacker/repoB', trust_remote_code=False) — the local-path branch never invoked download(), so the gate was never reached and remote code from repoB executed. DiffusionPipeline.from_pretrained('/local/snapshot', trust_remote_code=False) where the snapshot contains custom component files (e.g. unet/my_unet_model.py) referenced from model_index.json — same root cause; the local path skipped download() and custom component code executed. This vulnerability is fixed in 0.38.0.

## CVSS-Vektor

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

## Patch verfügbar (OSV)

- 275869dcae4ebcfee6a80253fdabc56033335020 (Commit)

## Referenzen

- <https://github.com/huggingface/diffusers/security/advisories/GHSA-98h9-4798-4q5v>
- <https://access.redhat.com/errata/RHSA-2026:60520>
- <https://access.redhat.com/security/cve/CVE-2026-44513>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2477507>
- <https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44513.json>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-44513) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_