CVE-2026-101101: ag-ui-protocol ag-ui Middleware convert.ts JSON.parse uncaught exception

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-28 · updated 2026-09-28
Weakness: CWE-248

Description

A vulnerability has been found in ag-ui-protocol ag-ui up to 2026-09-07. This issue affects the function JSON.parse of the file legacy/convert.ts of the component Middleware. The manipulation leads to uncaught exception. Remote exploitation of the attack is possible. Upgrading to version 2026-09-08 is capable of addressing this issue. The identifier of the patch is 30f8c794d5b73df5c610153043db502b2cc106cc. Upgrading the affected component is recommended.

Affected products

ag-ui-protocol ag-ui: 2026-09-07

References

https://github.com/ag-ui-protocol/ag-ui/
https://github.com/ag-ui-protocol/ag-ui/commit/30f8c794d5b73df5c610153043db502b2cc106cc
https://github.com/ag-ui-protocol/ag-ui/issues/2444
https://github.com/ag-ui-protocol/ag-ui/pull/2493
https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08
https://vuldb.com/cve/CVE-2026-101101
https://vuldb.com/submit/934981
https://vuldb.com/vuln/410976
https://vuldb.com/vuln/410976/cti

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