ag-ui-protocol ag-ui Middleware filter-tool-calls.ts FilterToolCallsMiddleware cleanup

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-101100
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-28 18:17:16 UTC
Updated2026-09-28 21:03:44 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 5.3 MEDIUM from [email protected]

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-459 | CWE-459 Incomplete Cleanup

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary5.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED5.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
3.1[email protected]Primary5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
3.1CNADECLARED5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C
3.0CNADECLARED5.4MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C
2.0[email protected]Secondary5.5AV:N/AC:L/Au:S/C:N/I:P/A:P
2.0CNADECLARED5.5AV:N/AC:L/Au:S/C:N/I:P/A:P/E:ND/RL:OF/RC:C

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

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

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Ag-ui-protocol Ag-ui affected 2026-09-07 Not specified
CNA Ag-ui-protocol Ag-ui unaffected 2026-09-08 Not specified

References

ReferenceSourceLinkTags
github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08 [email protected] github.com
vuldb.com/cve/CVE-2026-101100 [email protected] vuldb.com
github.com/ag-ui-protocol/ag-ui/pull/2494 [email protected] github.com
vuldb.com/vuln/410975 [email protected] vuldb.com
vuldb.com/vuln/410975/cti [email protected] vuldb.com
github.com/ag-ui-protocol/ag-ui/commit/c346119fe870b70f5c19738ee5119f3e1... [email protected] github.com
vuldb.com/submit/934980 [email protected] vuldb.com
github.com/ag-ui-protocol/ag-ui [email protected] github.com
github.com/ag-ui-protocol/ag-ui/issues/2443 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: meraklbz (VulDB User) (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-09-08T00:00:00.000ZCountermeasure disclosed
CNA2026-09-28T00:00:00.000ZAdvisory disclosed
CNA2026-09-28T02:00:00.000ZVulDB entry created
CNA2026-09-28T04:58:57.000ZVulDB entry last update

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