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.
Weakness
The product does not properly “clean up” and remove temporary or supporting resources after they have been used.
Potential Mitigations
References
- https://github.com/ag-ui-protocol/ag-ui/
- https://github.com/ag-ui-protocol/ag-ui/commit/c346119fe870b70f5c19738ee5119f3e1456e59d
- https://github.com/ag-ui-protocol/ag-ui/issues/2443
- https://github.com/ag-ui-protocol/ag-ui/pull/2494
- https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08
- https://vuldb.com/cve/CVE-2026-101100
- https://vuldb.com/submit/934980
- https://vuldb.com/vuln/410975
- https://vuldb.com/vuln/410975/cti