Answer in brief
CVE-2026-120235 records a Medium severity (CVSS 5.3) vulnerability in ag-ui-protocol ag-ui SSE Parser sse.ts parseSSEStream resource consumption. The current sources do not mark it as known exploited. The current feed maps ag-ui-protocol/ag-ui (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps ag-ui-protocol/ag-ui (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| ag-ui-protocol/ag-uigeneric | 0.0.1 || 0.0.2 || 0.0.3 || 0.0.4 || 0.0.5 || 0.0.6 || 0.0.7 || 0.0.8 || 0.0.9 || 0.0.10 || 0.0.11 || 0.0.12 || 0.0.13 || 0.0.14 || 0.0.15 || 0.0.16 || 0.0.17 || 0.0.18 || 0.0.19 || 0.0.20 || 0.0.21 || 0.0.22 || 0.0.23 || 0.0.24 || 0.0.25 || 0.0.26 || 0.0.27 || 0.0.28 || 0.0.29 || 0.0.30 || 0.0.31 || 0.0.32 || 0.0.33 || 0.0.34 || 0.0.35 || 0.0.36 || 0.0.37 || 0.0.38 || 0.0.39 || 0.0.40 || 0.0.41 || 0.0.42 || 0.0.43 || 0.0.44 || 0.0.45 || 0.0.46 || 0.0.47 || 0.0.48 || 0.0.49 || 0.0.50 || 0.0.51 || 0.0.52 || 0.0.53 || 0.0.54 || 0.0.55 || 0.0.56 || 0.0.57 || 0.0.58 | Not reported |
Published upstream
Nov 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 1, 2026
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.
Quoted source text, attributed separately from HOL analysis.