CVE-2026-85693Network attack vector

Cross-user file disclosure via unvalidated retrieval UUIDs

Published Sep 4, 2026 · Updated Sep 4, 2026

Authorization bypass in Chatbot UI allows remote authenticated users to read indexed content from other users' private files. The retrieval POST handler accepts caller-supplied file UUIDs and sends them through a service-role Supabase client to matching RPCs without checking ownership, bypassing row-level security. Any logged-in low-privilege account can retrieve embedded content chunks for a known victim file UUID, but the flaw does not allow file modification or service interruption.

CVSS severity7.1
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Chatbot UI allows remote authenticated users to read indexed content from other users' private files. The retrieval POST handler accepts caller-supplied file UUIDs and sends them through a service-role Supabase client to matching RPCs without checking ownership, bypassing row-level security. Any logged-in low-privilege account can retrieve embedded content chunks for a known victim file UUID, but the flaw does not allow file modification or service interruption.

The record

CVE
CVE-2026-85693
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
McKay Wrigley
Product
Chatbot UI
Classifications
CWE-639, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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?

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  1. Affected versionversion=0 <=81328b61d2a4ab597a7a057be70e785cf756d9f8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

McKay Wrigley · Chatbot UIversion=0 <=81328b61d2a4ab597a7a057be70e785cf756d9f8

Published CVSS scores

7.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
6.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

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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