Security advisory

{
  "id": "3ea4c581b4df67529c4fdb03e72b02c7933164b3091f019812dc2a65a58b7f92",
  "url": "https://osv.dev/vulnerability/CVE-2026-50787",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-50787",
    "summary": "e-SIC Livre (esiclivre) v0.2.2 and earlier contains an uncontrolled resource consumption vulnerability in restrito/inc/captcha.php. The application uses user-supplied parameters (l, a, tf, ql) without validation to generate CAPTCHA images, allowing remote attackers to cause denial of service via excessive memory and CPU consumption.",
    "evidence": "osv:CVE-2026-50787",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-50787",
      "aliases": [
        "CVE-2026-50787"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/esiclivre/esiclivre",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "0a72b4c9ab89244ec3bd3d7fa0b765850cc9afd7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.2.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50787.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.939099598Z",
      "provider": "osv",
      "references": [
        "https://github.com/esiclivre/esiclivre/blob/master/restrito/inc/captcha.php",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50787.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-50787",
        "https://github.com/brynax/CVE-2026-50787"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50787.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-50787",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504387,
  "published_at": "2026-10-23T00:00:00+00:00"
}