CVE-2026-59214
CWE-79Published: July 9, 2026· Updated: Jul 10, 2026
Official Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, Open WebUI runs client-side Python with Pyodide in a same-origin web worker, allowing stored chat payloads that use pyodide.http.pyfetch or the js module fetch and XMLHttpRequest APIs to issue authenticated same-origin requests when a victim clicks Run, which can reach admin-only endpoints and execute server-side code through configured tools. This issue is fixed in version 0.10.0.
Risk Analysis
This critical vulnerability in Open WebUI allows stored chat payloads to execute authenticated same-origin requests, potentially leading to server-side code execution. With a CVSS score of 9.0, this flaw poses a significant risk, as it can reach admin-only endpoints. The absence of an EPSS score means the exploitation likelihood is not yet quantified, but the severity is high.
No public exploit is currently known for this vulnerability. Exploitation requires a user to click 'Run' on a malicious chat payload, making it remotely exploitable with low attack complexity.
Upgrade Open WebUI to version 0.10.0 or later to fix this issue. Users should also exercise caution when interacting with chat payloads from untrusted sources.
Technical Analysis
CVE-2026-59214 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.0.
The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.
From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (1)
Quick Facts
Related CVEs (CWE-79)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-59214 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts