a2aproject a2a-java TaskManager.saveTaskEvent race condition

{
  "id": "ae1a66740859cea8a4297b6544e63108aa4f2e58e17db782880ba661fbbdfdd5",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-117507",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "a2aproject a2a-java TaskManager.saveTaskEvent race condition",
    "summary": "A security vulnerability has been detected in a2aproject a2a-java up to 1.2.0.Final. This impacts the function TaskManager.saveTaskEvent. The manipulation leads to race condition. The attack may be initiated remotely. Upgrading to version 1.3.0.Final will fix this issue. The identifier of the patch is 6b8e1e085c35e970ef0048901cd25850e4791ec2. The affected component should be upgraded.",
    "evidence": "cve:CVE-2026-117507",
    "products": [
      {
        "name": {
          "value": "a2a-java",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-117507",
      "aliases": [
        "CVE-2026-117507"
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "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"
          }
        },
        {
          "cvssV3_1": {
            "version": "3.1",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C"
          }
        },
        {
          "cvssV3_0": {
            "version": "3.0",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "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"
          }
        },
        {
          "cvssV2_0": {
            "version": "2.0",
            "baseScore": 5.5,
            "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:P/E:ND/RL:OF/RC:C"
          }
        }
      ],
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:a2aproject:a2a-java:*:*:*:*:*:*:*:*"
          ],
          "vendor": "a2aproject",
          "product": "a2a-java",
          "versions": [
            {
              "status": "affected",
              "version": "1.2.0.Final"
            },
            {
              "status": "unaffected",
              "version": "1.3.0.Final"
            }
          ]
        }
      ],
      "modified": "2026-10-27T15:00:21.118Z",
      "provider": "cve",
      "references": [
        "https://vuldb.com/vuln/427074",
        "https://vuldb.com/vuln/427074/cti",
        "https://vuldb.com/cve/CVE-2026-117507",
        "https://vuldb.com/submit/1015060",
        "https://github.com/a2aproject/a2a-java/pull/1045",
        "https://github.com/a2aproject/a2a-java/commit/6b8e1e085c35e970ef0048901cd25850e4791ec2",
        "https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final",
        "https://github.com/a2aproject/a2a-java/"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
          "shortName": "VulDB",
          "dateUpdated": "2026-10-27T15:00:21.118Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-117507",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 392709,
  "published_at": "2026-10-27T15:00:21.118+00:00"
}