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

Type: advisorySources: OSV

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.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-101100
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 05:58 UTC · Revision 1

Source evidence

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

core-osv · Original source

Published 28 Sept 2026, 17:30 UTC

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.

osv:CVE-2026-101100
Complete source record
{
  "id": "e168b1f8bae87bf85ee7dfdb85ba7b113579f8074804d23ac0d7eb52d4a10595",
  "url": "https://osv.dev/vulnerability/CVE-2026-101100",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ag-ui-protocol ag-ui Middleware filter-tool-calls.ts FilterToolCallsMiddleware cleanup",
    "summary": "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.",
    "evidence": "osv:CVE-2026-101100",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-101100",
      "aliases": [
        "CVE-2026-101100"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ag-ui-protocol/ag-ui",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "c346119fe870b70f5c19738ee5119f3e1456e59d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "c346119fe870b70f5c19738ee5119f3e1456e59d"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
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                ]
              }
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-101100.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.275704319Z",
      "provider": "osv",
      "references": [
        "https://github.com/ag-ui-protocol/ag-ui/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101100.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-101100",
        "https://vuldb.com/cve/CVE-2026-101100",
        "https://vuldb.com/submit/934980",
        "https://vuldb.com/vuln/410975",
        "https://github.com/ag-ui-protocol/ag-ui/issues/2443",
        "https://vuldb.com/vuln/410975/cti",
        "https://github.com/ag-ui-protocol/ag-ui/commit/c346119fe870b70f5c19738ee5119f3e1456e59d",
        "https://github.com/ag-ui-protocol/ag-ui/pull/2494",
        "https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-459"
        ],
        "cna_assigner": "VulDB",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2026-09-07"
                  },
                  {
                    "last_affected": "2026-09-07"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandaloneSingleVersion"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "2026-09-07"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101100.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-101100",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492897,
  "published_at": "2026-09-28T17:30:15.988+00:00"
}