# CVE-2026-120236: CVE-2026-120236

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

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.

## 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:L/VI:L/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: 6.3 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L; source: NVD: cna@vuldb.com

- CVSS 2.0: 6.5 (medium); AV:N/AC:L/Au:S/C:P/I:P/A:P; source: NVD: cna@vuldb.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-20

## 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/660182b973a44b8eda5484b14b88eb9cc251edc4 (cna@vuldb.com)

- https://github.com/ag-ui-protocol/ag-ui/issues/2524 (cna@vuldb.com)

- https://github.com/ag-ui-protocol/ag-ui/pull/2774 (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-2026-120236 (cna@vuldb.com)

- https://vuldb.com/submit/1015178 (cna@vuldb.com)

- https://vuldb.com/vuln/429595 (cna@vuldb.com)

- https://vuldb.com/vuln/429595/cti (cna@vuldb.com)

## Provenance

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-120236; retrieved 2026-11-02; source updated 2026-11-01

Revision: 82db4fc97b5588ea189ba572bfcc784dd31bba665ae30d3846acf69d6b6fd7f1

Canonical: https://y2.dev/cve/CVE-2026-120236