{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:graylog:graylog:2.2.3:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "2.2.3"
              },
              {
                "last_affected": "2.2.3"
              }
            ],
            "source": "CPE_STRING"
          },
          "events": [
            {
              "introduced": "7adc951e40b9dcacc3bc60d2b51e8a5e976ca53b"
            },
            {
              "last_affected": "7adc951e40b9dcacc3bc60d2b51e8a5e976ca53b"
            }
          ],
          "repo": "https://github.com/graylog2/graylog2-server",
          "type": "GIT"
        }
      ],
      "versions": [
        "2.2.3"
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "INCIBE",
    "cwe_ids": [
      "CWE-613"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1435.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "2.2.3"
          },
          {
            "last_affected": "2.2.3"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Not properly invalidated session vulnerability in Graylog Web Interface, version 2.2.3, due to incorrect management of session invalidation after new logins. The application generates a new 'sessionId' each time a user authenticates, but does not invalidate previously issued session identifiers, which remain valid even after multiple consecutive logins by the same user. As a result, a stolen or leaked 'sessionId' can continue to be used to authenticate valid requests. Exploiting this vulnerability would allow an attacker with access to the web service/API network (port 9000 or HTTP/S endpoint of the server) to reuse an old session token to gain unauthorized access to the application, interact with the API/web, and compromise the integrity of the affected account.",
  "id": "CVE-2026-1435",
  "modified": "2026-08-12T03:51:41.947712554Z",
  "published": "2026-02-18T13:08:36.348Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1435.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1435"
    },
    {
      "type": "FIX",
      "url": "https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-graylog"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Incorrect management of session invalidation vulnerability in Graylog Web Interface"
}