Medium severity · published Sep 28, 2026
CVE-2026-101100
ag-ui-protocol ag-ui Middleware filter-tool-calls.ts FilterToolCallsMiddleware cleanup
5.4
CVSS
0.3%
EPSS
No
On KEV
Description
A flaw has been found in ag-ui-protocol ag-ui up to 2026-09-07. This vulnerability affects the function FilterToolCallsMiddleware of the file sdks/typescript/packages/client/src/middleware/filter-tool-calls.ts of the component Middleware. Executing a manipulation can lead to incomplete cleanup. The attack may be launched remotely. Upgrading to version 2026-09-08 is able to resolve this issue. This patch is called c346119fe870b70f5c19738ee5119f3e1456e59d. It is suggested to upgrade the affected component.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AG
ag-ui · ag-ui-protocol
2026-09-07 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-101100
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-101100
vdb-entry
https://vuldb.com/vuln/410975
signature
https://vuldb.com/vuln/410975/cti
third-party-advisory
https://vuldb.com/cve/CVE-2026-101100
third-party-advisory
https://vuldb.com/submit/934980
issue-tracking
https://github.com/ag-ui-protocol/ag-ui/issues/2443
issue-tracking
https://github.com/ag-ui-protocol/ag-ui/pull/2494
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