Unauthenticated profile disclosure and modification via user_id
Published Mar 8, 2026 · Updated Mar 8, 2026
IDOR in AgentChat 2.0 through 2.3.0 allows remote attackers to read and modify arbitrary user profiles via the User Endpoint. The get_user_info and update_user_info handlers accept a caller-controlled user_id and pass it to user-service operations without checking authorization. No authentication or user interaction is required; exposure is limited to profile information reads and avatar or description changes.
Summary
What happened
IDOR in AgentChat 2.0 through 2.3.0 allows remote attackers to read and modify arbitrary user profiles via the User Endpoint. The get_user_info and update_user_info handlers accept a caller-controlled user_id and pass it to user-service operations without checking authorization. No authentication or user interaction is required; exposure is limited to profile information reads and avatar or description changes.
The record
- CVE
- CVE-2026-3693
- Published
- Mar 8, 2026
- Updated
- Mar 8, 2026
- Vendor
- Shy2593666979
- Product
- AgentChat
- Classifications
- CWE-99, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 8, 2026CVE publishedPublication date reported by the CVE source.
- Mar 8, 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.
- Affected versionversion=2.0
- Affected versionversion=2.1
- Affected versionversion=2.2
- Affected versionversion=2.3.0
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
- AgentChat user information disclosure proof of conceptproof of concept · demonstrated
- AgentChat user profile modification proof of conceptproof of concept · demonstrated
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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