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

Quick assessment

Affected
ag-ui-protocol ag-ui
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 ag-ui-protocol ag-ui 2026-09-07 及之前版本中发现了一个漏洞。该漏洞影响组件“Middleware”中文件 里的 函数。执行特定操作可能导致清理不完整。该漏洞可从远程发起攻击。升级至版本 2026-09-08 可解决此问题。该补丁的哈希值为 c346119fe870b70f5c19738ee5119f3e1456e59d。建议受影响的组件升级到修复版本。

CVSS 5.4 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
ag-ui-protocol ag-ui 2026-09-07 affected
2026-09-08 unaffected
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I. Basic Information for CVE-2026-101100

Vulnerability Information
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Vulnerability Title
ag-ui-protocol ag-ui Middleware filter-tool-calls.ts FilterToolCallsMiddleware cleanup
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
清理环节不完整
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ag-ui-protocol ag-ui 2026-09-07 cpe:2.3:a:ag-ui-protocol:ag-ui:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-101100

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III. Intelligence Information for CVE-2026-101100

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Other References for CVE-2026-101100 (7)

Same Patch Batch · ag-ui-protocol · 2026-09-28 · 4 CVEs total

CVE-2026-101098 4.3 MEDIUM ag-ui-protocol ag-ui HTTP JdkAgentHttpHandler.java readAllBytes resource consumption
CVE-2026-101099 4.3 MEDIUM ag-ui-protocol ag-ui Kotlin Community SDK SseParser.kt exceptional condition
CVE-2026-101101 4.3 MEDIUM ag-ui-protocol ag-ui Middleware convert.ts JSON.parse uncaught exception

IV. Related Vulnerabilities

Same product: ag-ui
Same vendor: ag-ui-protocol
Same weakness: CWE-459

V. Comments for CVE-2026-101100

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