CVE-2026-101100

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 v3 5.4 MEDIUM
CVSS v2.0 5.5 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

5.5^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:N/I:P/A:P

Exploitability : 8.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/ag-ui-protocol/ag-ui/
https://github.com/ag-ui-protocol/ag-ui/commit/c346119fe870b70f5c19738ee5119f3e1456e59d
https://github.com/ag-ui-protocol/ag-ui/issues/2443
https://github.com/ag-ui-protocol/ag-ui/pull/2494
https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08
https://vuldb.com/cve/CVE-2026-101100
https://vuldb.com/submit/934980
https://vuldb.com/vuln/410975
https://vuldb.com/vuln/410975/cti

Configurations

No configuration.

History

28 Sep 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-28 18:17

Updated : 2026-09-28 21:03

NVD link : CVE-2026-101100

Mitre link : CVE-2026-101100

CVE.ORG link : CVE-2026-101100

JSON object : View

Products Affected

No product.

CWE

CWE-459

Incomplete Cleanup

{"id": "CVE-2026-101100", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-101100", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-28T17:47:46.613540Z"}}], "cvssMetricV2": [{"type": "Secondary", "source": "cna@vuldb.com", "cvssData": {"version": "2.0", "baseScore": 5.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:P", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 4.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "cna@vuldb.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 2.5, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "cna@vuldb.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "cna@vuldb.com", "affectedData": [{"cpes": ["cpe:2.3:a:ag-ui-protocol:ag-ui:*:*:*:*:*:*:*:*"], "vendor": "ag-ui-protocol", "modules": ["Middleware"], "product": "ag-ui", "versions": [{"status": "affected", "version": "2026-09-07"}, {"status": "unaffected", "version": "2026-09-08"}]}]}], "published": "2026-09-28T18:17:16.977", "references": [{"url": "https://github.com/ag-ui-protocol/ag-ui/", "source": "cna@vuldb.com"}, {"url": "https://github.com/ag-ui-protocol/ag-ui/commit/c346119fe870b70f5c19738ee5119f3e1456e59d", "source": "cna@vuldb.com"}, {"url": "https://github.com/ag-ui-protocol/ag-ui/issues/2443", "source": "cna@vuldb.com"}, {"url": "https://github.com/ag-ui-protocol/ag-ui/pull/2494", "source": "cna@vuldb.com"}, {"url": "https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/cve/CVE-2026-101100", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/submit/934980", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/vuln/410975", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/vuln/410975/cti", "source": "cna@vuldb.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Primary", "source": "cna@vuldb.com", "description": [{"lang": "en", "value": "CWE-459"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-09-28T21:03:44.987", "sourceIdentifier": "cna@vuldb.com"}