What’s Vulnerable › Vulnerabilities

CVE-2026-101100: ag-ui-protocol ag-ui Middleware filter-tool-calls.ts FilterToolCallsMiddleware cleanup

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-28 · updated 2026-09-28
• Weakness: CWE-459

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.

Affected products

• ag-ui-protocol ag-ui: 2026-09-07

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

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