ag-ui-protocol ag-ui Event Application Layer agent.ts prepareRunAgentInput origin validation (CVE-2026-92360) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-92360

ag-ui-protocol ag-ui Event Application Layer agent.ts prepareRunAgentInput origin validation

Answer in brief

CVE-2026-92360 records a Unknown severity vulnerability in ag-ui-protocol ag-ui Event Application Layer agent.ts prepareRunAgentInput origin validation. 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.

Published Sep 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. 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.

Affected scope and exposure questions

The current feed maps ag-ui-protocol/ag-ui (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
ag-ui-protocol/ag-uigeneric	1.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for ag-ui-protocol/ag-ui.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.