# CVE-2026-120235: CVE-2026-120235

Status: published. Published: 2026-11-01. Updated: 2026-11-01.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

Not reported in collected sources.

## Severity and prioritization

- CVSS 4.0: 2.1 (low); 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: cna@vuldb.com

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L; source: NVD: cna@vuldb.com

- CVSS 2.0: 4 (medium); AV:N/AC:L/Au:S/C:N/I:N/A:P; source: NVD: cna@vuldb.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-400

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/ag-ui-protocol/ag-ui/ (cna@vuldb.com)

- https://github.com/ag-ui-protocol/ag-ui/commit/9e7b2b00bce215bbf731f1e6094f63812527c432 (cna@vuldb.com)

- https://github.com/ag-ui-protocol/ag-ui/issues/2522 (cna@vuldb.com)

- https://github.com/ag-ui-protocol/ag-ui/pull/2627 (cna@vuldb.com)

- https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-10-30 (cna@vuldb.com)

- https://vuldb.com/cve/CVE-2026-120235 (cna@vuldb.com)

- https://vuldb.com/submit/1015147 (cna@vuldb.com)

- https://vuldb.com/vuln/429594 (cna@vuldb.com)

- https://vuldb.com/vuln/429594/cti (cna@vuldb.com)

## Provenance

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-120235; retrieved 2026-11-02; source updated 2026-11-01

Revision: 2b9b78e2002d5e19f1e9304c8825862c0fe9f0bbbb03e09a8b00823c1522bc25

Canonical: https://y2.dev/cve/CVE-2026-120235