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Description

A flaw has been found in Shy2593666979 AgentChat up to 2.3.0. This issue affects the function get_user_info/update_user_info of the file /src/backend/agentchat/api/v1/user.py of the component User Endpoint. This manipulation of the argument user_id causes improper control of resource identifiers. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

PUBLISHED Reserved 2026-03-07 | Published 2026-03-08 | Updated 2026-03-08 | Assigner VulDB




MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Improper Control of Resource Identifiers

Product status

2.0
affected

2.1
affected

2.2
affected

2.3.0
affected

Timeline

2026-03-07:Advisory disclosed
2026-03-07:VulDB entry created
2026-03-07:VulDB entry last update

Credits

VulDB coordinator

References

vuldb.com/?id.349640 (VDB-349640 | Shy2593666979 AgentChat User Endpoint user.py update_user_info resource injection) vdb-entry technical-description

vuldb.com/?ctiid.349640 (VDB-349640 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.765589 (Submit #765589 | Shy2593666979 AgentChat <= v2.3.0 Authorization Bypass) third-party-advisory

vuldb.com/?submit.765590 (Submit #765590 | Shy2593666979 AgentChat <= v2.3.0 Authorization Bypass (Duplicate)) third-party-advisory

github.com/...ilities/tree/master/agent-chat/vulnerability-1 related

github.com/...ilities/tree/master/agent-chat/vulnerability-2 exploit

cve.org (CVE-2026-3693)

nvd.nist.gov (CVE-2026-3693)

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