CVE-2026-92360
ag-ui-protocol ag-ui Event Application Layer agent.ts prepareRunAgentInput origin validation
- State
- Published
- Severity
- 5.3 Medium
- Published
- Sep 16, 2026
- Updated
- Sep 22, 2026
- Reserved
- Sep 16, 2026
Description
A weakness has been identified in ag-ui-protocol ag-ui 1.0. The impacted element is the function prepareRunAgentInput of the file agent/agent.ts of the component Event Application Layer. This manipulation of the argument TEXT_MESSAGE_START causes origin validation error. Remote exploitation of the attack is possible. The pull request to fix this issue awaits acceptance.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X | VulDB |
| 3.1 | 6.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R | VulDB |
| 3.0 | 6.3 Medium | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R | VulDB |
| 2.0 | 6.5 Medium | AV:N/AC:L/Au:S/C:P/I:P/A:P/E:ND/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
ag-uiag-ui-protocol |
|
References
- VDB-405446 | ag-ui-protocol ag-ui Event Application Layer agent.ts prepareRunAgentInput origin validationvdb-entrytechnical-description
- VDB-405446 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-92360 | CVE Analysis and Reportthird-party-advisory
- Submit #934950 | ag-ui-protocol ag-ui v1.0 CWE-346third-party-advisory
- https://github.com/ag-ui-protocol/ag-ui/issues/2437issue-tracking
- https://github.com/ag-ui-protocol/ag-ui/pull/2701issue-trackingpatch
- https://github.com/ag-ui-protocol/ag-ui/product
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