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CVE-2026-120236— ag-ui-protocol ag-ui Transport Decoder input validation

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）中发现一处漏洞。该漏洞影响组件中 Transport Decoder Handler 的某个未知功能，攻击者可通过操纵导致输入验证不当。此攻击可远程发起，且利用代码已公开并可用。修复补丁标识为 660182b973a44b8eda5484b14b88eb9cc251edc4。建议立即升级受影响的组件。

CVSS 6.3 · Medium Updated Nov 02, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

ag-ui-protocol ag-ui Transport Decoder input validation

Source: CVE Program / CVE List V5

Vulnerability Description

A vulnerability was detected in ag-ui-protocol ag-ui up to 0.0.58. Affected by this vulnerability is an unknown functionality of the component Transport Decoder Handler. The manipulation results in improper input validation. The attack may be launched remotely. The exploit is now public and may be used. The patch is identified as 660182b973a44b8eda5484b14b88eb9cc251edc4. 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:L/I:L/A:L

Source: CVE Program / CVE List V5

Vulnerability Type

输入验证不恰当

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-2026-120236

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-120236

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Vendor Advisories for CVE-2026-120236 (1)

CVE-2026-120236 | ag-ui-protocol ag-ui up to 0.0.58 Transport Decoder input validation (Issue 2524) vdb-entry

Other References for CVE-2026-120236 (7)

https://github.com/ag-ui-protocol/ag-ui/pull/2774 issue-tracking patch
https://github.com/ag-ui-protocol/ag-ui/commit/660182b973a44b8eda5484b14b88eb9cc251edc4 patch
https://github.com/ag-ui-protocol/ag-ui/issues/2524 exploit issue-tracking
https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-10-30 patch
https://vuldb.com/vuln/429595/cti signature permissions-required
https://vuldb.com/cve/CVE-2026-120236 third-party-advisory
https://vuldb.com/submit/1015178 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-120236

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

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-2026-120235	4.3 MEDIUM	ag-ui-protocol ag-ui SSE Parser sse.ts parseSSEStream 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-20