CVE-2026-54020

Katalog CVE

CVSS 6.3 · Medium EPSS 0,25%

Kerentanan Time-of-check Time-of-use (TOCTOU) Race Condition pada openwebui open webui. Skor CVSS 3.1 6.3 (Medium) menurut github.com.

Deskripsi (NVD)

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.0, Open WebUI resolved a hostname during URL validation and rejected private, loopback, and link-local addresses, but the HTTP clients resolved the hostname again at connection time. An authenticated attacker who controlled authoritative DNS for a submitted hostname could answer with a public address during validation and an internal one during connection, reaching cloud metadata, loopback admin APIs, or internal services through URL ingest, chat image_url fetches, image editing, or OAuth profile-picture fetches, with most paths returning the response to the attacker and the OAuth path forwarding the OAuth access token. This issue is fixed in 0.11.0.

Rincian

Terbit di NVD

4 Agustus 2026

Terakhir diubah

18 September 2026

Status NVD

Analyzed

CVSS 3.1

6.3 (Medium), sumber github.com
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-918: Server-Side Request Forgery (SSRF)

EPSS (30 hari)

0,25% peluang dieksploitasi; lebih tinggi dari 15,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/open-webui/open-webui/security/advisories/GHSA-h6x2-583h-x99r patch · advisory vendor
• https://github.com/open-webui/open-webui/releases/tag/v0.11.0 release notes