Vulnerability · Published Nov 1, 2026 · Assigned by VulDB
CVE-2026-120235ag-ui-protocol ag-ui SSE Parser sse.ts parseSSEStream resource consumption
Medium 4.3
In plain English
A medium-severity uncontrolled resource consumption in ag-ui from ag-ui-protocol. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).
Official description
A security vulnerability has been detected in ag-ui-protocol ag-ui up to 0.0.58. Affected is the function parseSSEStream of the file sdks/typescript/packages/client/src/transform/sse.ts of the component SSE Parser. The manipulation leads to resource consumption. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The identifier of the patch is 9e7b2b00bce215bbf731f1e6094f63812527c432. The affected component should be upgraded.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ag-ui-protocol | ag-ui | 0.0.10.0.20.0.30.0.40.0.50.0.60.0.70.0.8 |
Weakness: CWE-400, CWE-404 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
References
- VDB-429594 | ag-ui-protocol ag-ui SSE Parser sse.ts parseSSEStream resource consumption vdb-entry, technical-description
- VDB-429594 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- CVE-2026-120235 | CVE Analysis and Report third-party-advisory
- Submit #1015147 | ag-ui-protocol ag-ui <=0.0.58 CWE-400 third-party-advisory
- https://github.com/ag-ui-protocol/ag-ui/issues/2522 exploit, issue-tracking
- https://github.com/ag-ui-protocol/ag-ui/pull/2627 issue-tracking, patch
- https://github.com/ag-ui-protocol/ag-ui/commit/9e7b2b00bce215bbf731f1e6094f63812527c432 patch
- https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-10-30 patch
- https://github.com/ag-ui-protocol/ag-ui/ product