{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "1.1.0"
              },
              {
                "last_affected": "1.1.0"
              },
              {
                "introduced": "1.1.1"
              },
              {
                "last_affected": "1.1.1"
              },
              {
                "introduced": "1.1.2"
              },
              {
                "last_affected": "1.1.2"
              },
              {
                "introduced": "1.1.3"
              },
              {
                "last_affected": "1.1.3"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "96c14b79325c72560359ad112998c0c09ed0b249"
            },
            {
              "fixed": "2d4d3048b245d2af854bad804f0e722ea9febc08"
            }
          ],
          "repo": "https://github.com/a2aproject/a2a-python",
          "type": "GIT"
        }
      ],
      "versions": [
        "1.1.0",
        "1.1.1",
        "1.1.2",
        "1.1.3"
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulDB",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90790.json"
  },
  "details": "A security vulnerability has been detected in a2aproject a2a-python up to 1.1.3. This affects the function _dispatch_notification of the file src/a2a/server/tasks/base_push_notification_sender.py of the component Push Notification Sender. The manipulation of the argument push_info.url leads to server-side request forgery. Remote exploitation of the attack is possible. Upgrading to version 1.1.4 is able to mitigate this issue. It is suggested to upgrade the affected component.",
  "id": "CVE-2026-90790",
  "modified": "2026-09-17T03:31:10.349757488Z",
  "published": "2026-09-14T14:30:35.448Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/a2aproject/a2a-python/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90790.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90790"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/cve/CVE-2026-90790"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/submit/919747"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/vuln/403296"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/vuln/403296/cti"
    },
    {
      "type": "FIX",
      "url": "https://github.com/a2aproject/a2a-python/pull/1164"
    },
    {
      "type": "FIX",
      "url": "https://github.com/a2aproject/a2a-python/pull/1169"
    },
    {
      "type": "FIX",
      "url": "https://github.com/a2aproject/a2a-python/releases/tag/v1.1.4"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X",
      "type": "CVSS_V4"
    }
  ],
  "summary": "a2aproject a2a-python Push Notification Sender base_push_notification_sender.py _dispatch_notification server-side request forgery"
}