Vulnerability in Ag-Ui-Protocol Ag-Ui
CVE-2026-101100
A flaw has been found in ag-ui-protocol ag-ui up to 2026-09-07. This vulnerability affects the function FilterToolCallsMiddleware of the file sdks/typescript/packages/client/src/middleware/filter-tool-calls.ts of the component Middleware. Executing a manipulation can lead to incomplete cleanup. The attack may be launched remotely. Upgrading to version 2026-09-08 is able to resolve this issue. This patch is called c346119fe870b70f5c19738ee5119f3e1456e59d. It is suggested to upgrade the affected component.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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 2026-09-07
Weakness classification (CWE)
References
- vuldb.com/vuln/410975 (technical-description, vdb-entry)
- vuldb.com/vuln/410975/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-101100 (third-party-advisory)
- vuldb.com/submit/934980 (third-party-advisory)
- github.com/ag-ui-protocol/ag-ui/issues/2443 (issue-tracking)
- github.com/ag-ui-protocol/ag-ui/pull/2494 (issue-tracking, patch)
- github.com/ag-ui-protocol/ag-ui/commit/c346119fe870b70f5c19738ee5119f3e1456e59d (patch)
- github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08 (patch)
- github.com/ag-ui-protocol/ag-ui/ (product)
Frequently asked questions
- What is CVE-2026-101100?
- CVE-2026-101100 is a medium-severity vulnerability in Ag-Ui-Protocol Ag-Ui, classified under Incomplete Cleanup. CVSS score: 5.4/10. Published 2026-09-28.
- How severe is CVE-2026-101100?
- Medium severity. CVSS v3 base score is 5.4 out of 10.