Description
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.
References9
- github.com/ag-ui-protocol/ag-ui/
- github.com/ag-ui-protocol/ag-ui/commit/c346119fe870b70f5c19738e…
- github.com/ag-ui-protocol/ag-ui/issues/2443
- github.com/ag-ui-protocol/ag-ui/pull/2494
- github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08
- vuldb.com/cve/CVE-2026-101100
- vuldb.com/submit/934980
- vuldb.com/vuln/410975
- vuldb.com/vuln/410975/cti
Metrics
- CVSS 3.1
-
5.4
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L - CVSS 4.0
-
5.3
MEDIUM
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 23 · as of 9 November 2026
- CWE
- CWE-459
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.