CVE-2026-59715Public exploitNetwork attack vector

Unauthenticated presence manipulation via unchecked Socket.IO handlers

Published Jul 9, 2026 · Updated Jul 9, 2026

Missing authentication in Open WebUI 0.6.16 through 0.9.6 allows remote attackers to alter collaborative-document presence over Socket.IO. The ydoc:awareness:update and ydoc:document:leave handlers trust unauthenticated sockets admitted by always_connect=True, accept client-supplied document and user identifiers, and broadcast forged presence or leave events without SESSION_POOL or room-membership checks. Reaching other users requires a known or guessed note UUID; forged events disrupt live cursors and presence, while unlimited anonymous WebSocket sessions can exhaust server resources.

CVSS severity3.1
Low
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Open WebUI 0.6.16 through 0.9.6 allows remote attackers to alter collaborative-document presence over Socket.IO. The ydoc:awareness:update and ydoc:document:leave handlers trust unauthenticated sockets admitted by always_connect=True, accept client-supplied document and user identifiers, and broadcast forged presence or leave events without SESSION_POOL or room-membership checks. Reaching other users requires a known or guessed note UUID; forged events disrupt live cursors and presence, while unlimited anonymous WebSocket sessions can exhaust server resources.

The record

CVE
CVE-2026-59715
Published
Jul 9, 2026
Updated
Jul 9, 2026
Vendor
Open WebUI
Product
Open WebUI
Classifications
CWE-306, T1499.002, T1565.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=>= 0.6.16, < 0.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open WebUI · Open WebUIversion=>= 0.6.16, < 0.10.0

Published CVSS scores

3.1GitHubCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1499.002Service Exhaustion Flood
T1565.003Runtime Data Manipulation

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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