CVE-2026-120236: Input Validation Flaw (CVSS 6.3)

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.

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CVSS v3.1 Score

6.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Weakness Type (CWE)

CWE-20 Improper Input Validation

References

Other References

https://github.com/ag-ui-protocol/ag-ui/ https://github.com/ag-ui-protocol/ag-ui/commit/660182b973a44b8eda5484b14b88eb9cc251edc4 https://github.com/ag-ui-protocol/ag-ui/issues/2524 https://github.com/ag-ui-protocol/ag-ui/pull/2774 https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-10-30 https://vuldb.com/cve/CVE-2026-120236 https://vuldb.com/submit/1015178 https://vuldb.com/vuln/429595 https://vuldb.com/vuln/429595/cti

Frequently Asked Questions

What is CVE-2026-120236? +

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. It has a CVSS v3.1 base score of 6.3 (MEDIUM).

How severe is CVE-2026-120236? +

CVE-2026-120236 has a CVSS v3.1 score of 6.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2026-120236? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-120236