CVE-2026-120235

MEDIUM 4.3

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

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-400 CWE-404
Vendor	ag-ui-protocol
Product	ag-ui
Published	Nov 1, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

ag-ui-protocol / ag-ui

0.0.1 0.0.2 0.0.3 0.0.4 0.0.5 0.0.6 0.0.7 0.0.8 0.0.9 0.0.10 0.0.11 0.0.12 0.0.13 0.0.14 0.0.15 0.0.16 0.0.17 0.0.18 0.0.19 0.0.20 0.0.21 0.0.22 0.0.23 0.0.24 0.0.25 0.0.26 0.0.27 0.0.28 0.0.29 0.0.30 0.0.31 0.0.32 0.0.33 0.0.34 0.0.35 0.0.36 0.0.37 0.0.38 0.0.39 0.0.40 0.0.41 0.0.42 0.0.43 0.0.44 0.0.45 0.0.46 0.0.47 0.0.48 0.0.49 0.0.50 0.0.51 0.0.52 0.0.53 0.0.54 0.0.55 0.0.56 0.0.57 0.0.58

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 ez-lbz (VulDB User)