CVE-2025-64496Public exploitNetwork attack vector

Account takeover via unfiltered SSE execute events

Published Nov 8, 2025 · Updated Nov 8, 2025

Code injection in Open WebUI before 0.6.35 allows remote authenticated users to steal browser tokens through malicious model-server SSE events. The frontend SSE event handler forwards event data from direct connections and runs the event.data.code value with the Function constructor without validation, event-type filtering, or sandboxing. Direct Connections is disabled by default; an administrator must enable it, a user must add the malicious server and send a prompt, and stolen tokens permit account takeover, with backend execution only through a separate Functions API chain.

CVSS severity7.3
High
EPSS probability7.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Open WebUI before 0.6.35 allows remote authenticated users to steal browser tokens through malicious model-server SSE events. The frontend SSE event handler forwards event data from direct connections and runs the event.data.code value with the Function constructor without validation, event-type filtering, or sandboxing. Direct Connections is disabled by default; an administrator must enable it, a user must add the malicious server and send a prompt, and stolen tokens permit account takeover, with backend execution only through a separate Functions API chain.

The record

CVE
CVE-2025-64496
Published
Nov 8, 2025
Updated
Nov 8, 2025
Vendor
Open WebUI
Product
Open WebUI
Classifications
CWE-830, CWE-95, CWE-829, CWE-501, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.6.35

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open WebUI · Open WebUIversion=< 0.6.35

Published CVSS scores

7.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-830Inclusion of Web Functionality from an Untrusted Source
CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
CWE-829Inclusion of Functionality from Untrusted Control Sphere
CWE-501Trust Boundary Violation
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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