Vulnerability · Published Nov 1, 2026 · Assigned by VulDB
CVE-2026-120236ag-ui-protocol ag-ui Transport Decoder input validation
Medium 6.3
In plain English
A medium-severity improper input validation in ag-ui from ag-ui-protocol. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ag-ui-protocol | ag-ui | 0.0.10.0.20.0.30.0.40.0.50.0.60.0.70.0.8 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
References
- VDB-429595 | ag-ui-protocol ag-ui Transport Decoder input validation vdb-entry
- VDB-429595 | CTI Indicators (IOB, IOC) signature, permissions-required
- CVE-2026-120236 | CVE Analysis and Report third-party-advisory
- Submit #1015178 | ag-ui-protocol ag-ui <=0.0.58 CWE-20 third-party-advisory
- https://github.com/ag-ui-protocol/ag-ui/issues/2524 exploit, issue-tracking
- https://github.com/ag-ui-protocol/ag-ui/pull/2774 issue-tracking, patch
- https://github.com/ag-ui-protocol/ag-ui/commit/660182b973a44b8eda5484b14b88eb9cc251edc4 patch
- https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-10-30 patch
- https://github.com/ag-ui-protocol/ag-ui/ product