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CVE-2026-101099— ag-ui-protocol ag-ui Kotlin Community SDK SseParser.kt exceptional condition

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 的 ag-ui 组件（截至 2026-09-23 的版本）中发现了一个漏洞。该漏洞影响 Kotlin Community SDK 中 SseParser.kt 文件的未知部分。对该部分进行操纵会导致异常条件的处理问题。攻击者可远程发起此类攻击。修复该问题的拉取请求（Pull Request）目前正等待接受。

CVSS 4.3 · Medium Updated Sep 29, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
ag-ui-protocol	ag-ui	`2026-09-23`	affected

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Vulnerability Information

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Vulnerability Title

ag-ui-protocol ag-ui Kotlin Community SDK SseParser.kt exceptional condition

Source: CVE Program / CVE List V5

Vulnerability Description

A vulnerability was detected in ag-ui-protocol ag-ui up to 2026-09-23. This affects an unknown part of the file SseParser.kt of the component Kotlin Community SDK. Performing a manipulation results in handling of exceptional conditions. The attack may be initiated remotely. The pull request to fix this issue awaits acceptance.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Source: CVE Program / CVE List V5

Vulnerability Type

对异常条件的处理不恰当

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
ag-ui-protocol	ag-ui	2026-09-23	`cpe:2.3:a:ag-ui-protocol:ag-ui::::::::`

II. Public POCs for CVE-2026-101099

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-101099

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Other References for CVE-2026-101099 (5)

https://github.com/ag-ui-protocol/ag-ui/pull/2657 issue-tracking patch
https://github.com/ag-ui-protocol/ag-ui/issues/2442 issue-tracking
https://vuldb.com/cve/CVE-2026-101099 third-party-advisory
https://vuldb.com/vuln/410974/cti signature permissions-required
https://vuldb.com/submit/934974 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-101099

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

CVE-2026-101100	5.4 MEDIUM	ag-ui-protocol ag-ui Middleware filter-tool-calls.ts FilterToolCallsMiddleware cleanup
CVE-2026-101098	4.3 MEDIUM	ag-ui-protocol ag-ui HTTP JdkAgentHttpHandler.java readAllBytes resource consumption
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-755

V. Comments for CVE-2026-101099

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-101099— ag-ui-protocol ag-ui Kotlin Community SDK SseParser.kt exceptional condition

Quick assessment

Possible ATT&CK Techniques 1 AI

Affected Version Matrix 1

I. Basic Information for CVE-2026-101099

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-101099

III. Intelligence Information for CVE-2026-101099

Other References for CVE-2026-101099 (5)

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

IV. Related Vulnerabilities

V. Comments for CVE-2026-101099

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