AUGUST 16, 2026
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Case File

CVE-2026-54020

MEDIUM · CVSS 6.3 EPSS 0.21% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-04 · Last synced 2026-08-16

CyberRota Analysis

AI-Generated

Open WebUI versions prior to 0.11.0 are vulnerable to a DNS rebinding attack, allowing authenticated attackers with control over DNS to manipulate hostname resolutions. This could enable access to sensitive internal services, including cloud metadata and admin APIs, potentially exposing OAuth access tokens and other sensitive data. Organizations using affected versions should prioritize upgrading to 0.11.0 to mitigate the risk of unauthorized access and data exposure.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-54020
Severity
MEDIUM
CVSS
6.3
EPSS
0.21%

Original NVD Description

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.