Bug 2542581 (CVE-2026-101100)

Summary: CVE-2026-101100 @ag-ui/client: ag-ui-protocol ag-ui Middleware filter-tool-calls.ts FilterToolCallsMiddleware cleanup
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in ag-ui's `@ag-ui/client` npm package. When processing manipulated tool call inputs in `FilterToolCallsMiddleware` (`filter-tool-calls.ts`), the middleware fails to perform complete resource and state cleanup. A remote authenticated attacker can exploit this vulnerability by submitting crafted tool call payloads, leading to residual state corruption or resource leaks that degrade application integrity and availability.
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Description OSIDB Bzimport 2026-09-28 17:46:12 UTC
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.