Resource exhaustion in Ag-Ui-Protocol Ag-Ui
CVE-2026-120235
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.
Vulnerability class: DoS (Denial of Service)
Published .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Ag-Ui-Protocol Ag-Ui — versions 0.0.1, 0.0.10, 0.0.11
Weakness classification (CWE)
References
- github.com/ag-ui-protocol/ag-ui/ (product)
- github.com/ag-ui-protocol/ag-ui/commit/9e7b2b00bce215bbf731f1e6094f63812527c432 (patch)
- github.com/ag-ui-protocol/ag-ui/issues/2522 (issue-tracking, exploit)
- github.com/ag-ui-protocol/ag-ui/pull/2627 (issue-tracking, patch)
- github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-10-30 (patch)
- vuldb.com/cve/CVE-2026-120235 (third-party-advisory)
- vuldb.com/submit/1015147 (third-party-advisory)
- vuldb.com/vuln/429594 (technical-description, vdb-entry)
- vuldb.com/vuln/429594/cti (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-120235?
- CVE-2026-120235 is a medium-severity vulnerability in Ag-Ui-Protocol Ag-Ui, classified under Uncontrolled Resource Consumption. CVSS score: 4.3/10. Published 2026-11-01.
- How severe is CVE-2026-120235?
- Medium severity. CVSS v3 base score is 4.3 out of 10.