ag-ui-protocol ag-ui Event Application Layer agent.ts prepareRunAgentInput origin validation
Priority LOW 23CWE-345Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-345.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00208 11th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ag-ui-protocol | ag-ui | 1.0 | — | No fix listed | CNA |
- ag-ui Vendorag-ui-protocol Affected 1.0 Fixed in — No fix listed CNA
CPE names CNA · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ag-ui-protocol:ag-ui:*:*:*:*:*:*:*:* | — | — | — |
- cpe:2.3:a:ag-ui-protocol:ag-ui:*:*:*:*:*:*:*:* Versions — — ·—
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-92360
- 2026-10-03 Alias added: GHSA-wvf6-r87g-jh87
References
More ag-ui-protocol vulnerabilities
- TI-2026-83626 Information disclosure in ag-ui HttpAgent client CVSS 4.0MEDIUM 6.9
- TI-2026-83636 Uncontrolled resource consumption in ag-ui-protocol ag-ui CVSS 4.0MEDIUM 5.3
- TI-2026-83635 Improper input validation in ag-ui-protocol ag-ui Transport Decoder CVSS 4.0MEDIUM 5.3
- TI-2026-83632 Uncontrolled resource consumption in ag-ui SSE parser CVSS 4.0MEDIUM 5.3
- TI-2026-83628 Resource consumption in ag-ui-protocol ag-ui HTTP Transport CVSS 4.0MEDIUM 5.3
- TI-2026-62298 ag-ui-protocol ag-ui SSE Frame sse.rs resource consumption CVSS 4.0MEDIUM 6.9
Sources
- CVE-2026-92360 · CVE Program
- CVE-2026-92360 · NVD
- FIRST EPSS
- GHSA-wvf6-r87g-jh87 · GitHub Advisory Database · CC BY 4.0
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