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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

Exploitation poc

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Ag-ui-protocol
  • Ag-ui

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References
Link Providers
https://github.com/ag-ui-protocol/ag-ui/ cve-icon cve-icon
https://github.com/ag-ui-protocol/ag-ui/commit/9e7b2b00bce215bbf731f1e6094f63812527c432 cve-icon cve-icon
https://github.com/ag-ui-protocol/ag-ui/issues/2522 cve-icon cve-icon
https://github.com/ag-ui-protocol/ag-ui/pull/2627 cve-icon cve-icon
https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-10-30 cve-icon cve-icon
https://vuldb.com/cve/CVE-2026-120235 cve-icon cve-icon
https://vuldb.com/submit/1015147 cve-icon cve-icon
https://vuldb.com/vuln/429594 cve-icon cve-icon
https://vuldb.com/vuln/429594/cti cve-icon cve-icon
History

Mon, 02 Nov 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Sun, 01 Nov 2026 16:15:00 +0000

Type Values Removed Values Added
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.
Title ag-ui-protocol ag-ui SSE Parser sse.ts parseSSEStream resource consumption
First Time appeared Ag-ui-protocol
Ag-ui-protocol ag-ui
Weaknesses CWE-400
CWE-404
CPEs cpe:2.3:a:ag-ui-protocol:ag-ui:*:*:*:*:*:*:*:*
Vendors & Products Ag-ui-protocol
Ag-ui-protocol ag-ui
References
Metrics cvssV2_0

{'score': 4, 'vector': 'AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C'}

cvssV3_0

{'score': 4.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C'}

cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-11-01T16:00:21.124Z

Updated: 2026-11-02T17:41:44.705Z

Reserved: 2026-10-31T20:10:43.320Z

Link: CVE-2026-120235

cve-icon Vulnrichment

Updated: 2026-11-02T17:15:21.583Z

cve-icon NVD

Status : Deferred

Published: 2026-11-01T16:18:14.757

Modified: 2026-11-02T18:18:48.030

Link: CVE-2026-120235

cve-icon Redhat

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