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CVE-2026-120235— ag-ui-protocol ag-ui SSE Parser sse.ts parseSSEStream resource consumption

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（版本 0.0.58 及以下）中发现了一个安全漏洞。该漏洞影响位于文件中 SSE 解析器组件的函数。攻击者可通过恶意输入操纵该函数，导致资源过度消耗。该攻击可远程发起，且利用方法已公开，可能被利用。修复该漏洞的补丁标识为。建议立即升级受影响的组件。

CVSS 4.3 · Medium Updated Nov 02, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

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Vulnerability Title

ag-ui-protocol ag-ui SSE Parser sse.ts parseSSEStream resource consumption

Source: CVE Program / CVE List V5

Vulnerability Description

A security vulnerability has been detected in ag-ui-protocol ag-ui up to 0.0.58. Affected is the function parseSSEStream of the file sdks/typescript/packages/client/src/transform/sse.ts of the component SSE Parser. The manipulation leads to resource consumption. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The identifier of the patch is 9e7b2b00bce215bbf731f1e6094f63812527c432. The affected component should be upgraded.

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

未加控制的资源消耗(资源穷尽)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
ag-ui-protocol	ag-ui	0.0.1	`cpe:2.3:a:ag-ui-protocol:ag-ui::::::::`

II. Public POCs for CVE-2026-120235

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-120235

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Other References for CVE-2026-120235 (1)

CVE-2026-120235 | ag-ui-protocol ag-ui up to 0.0.58 SSE Parser sse.ts parseSSEStream resource consumption (Issue 2522) vdb-entry technical-description

Other References for CVE-2026-120235 (7)

https://github.com/ag-ui-protocol/ag-ui/pull/2627 issue-tracking patch
https://github.com/ag-ui-protocol/ag-ui/issues/2522 exploit issue-tracking
https://github.com/ag-ui-protocol/ag-ui/commit/9e7b2b00bce215bbf731f1e6094f63812527c432 patch
https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-10-30 patch
https://vuldb.com/cve/CVE-2026-120235 third-party-advisory
https://vuldb.com/vuln/429594/cti signature permissions-required
https://vuldb.com/submit/1015147 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-120235

Same Patch Batch · ag-ui-protocol · 2026-11-01 · 5 CVEs total

CVE-2026-120236	6.3 MEDIUM	ag-ui-protocol ag-ui Transport Decoder input validation
CVE-2026-120233	5.3 MEDIUM	ag-ui-protocol ag-ui HttpAgent http.ts information disclosure
CVE-2026-120234	4.3 MEDIUM	ag-ui-protocol ag-ui HTTP Transport e.text resource consumption
CVE-2026-120237	4.3 MEDIUM	ag-ui-protocol ag-ui Interrupt expiry index.ts isInterruptExpired resource consumption

IV. Related Vulnerabilities

Same product: ag-ui

Same vendor: ag-ui-protocol

Same weakness: CWE-400