Quick answers
- Is CVE-2026-120236 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-120236 being exploited in the wild.
- How severe is CVE-2026-120236?
- Medium severity, with a CVSS score of 6.3, published 1 November 2026.
- Which products and versions are affected?
- Ag-Ui-Protocol Ag-Ui up to 0.0.58.
- Is there a fix for CVE-2026-120236?
- Yes: fixed in 0.0.59 or later (commit 660182b973a44b8eda5484b14b88eb9cc251edc4). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-120236 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-120236?
- Check whether you run Ag-Ui-Protocol Ag-Ui at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 0.0.59 or later (commit 660182b973a44b8eda5484b14b88eb9cc251edc4)
Technical details
The vulnerability is an improper input validation flaw in the Transport Decoder Handler component of ag-ui. It is remotely exploitable with no known authentication or user interaction requirements. The exploit code is publicly available. A fix is available in commit 660182b973a44b8eda5484b14b88eb9cc251edc4, which appears to be part of the 1.0 release cycle.
Affected products
- ag-ui-protocol ag-ui up to 0.0.58
Timeline
- 2026-11-01: disclosed
- 2026-09-16: patched: Commit 660182b973a44b8eda5484b14b88eb9cc251edc4