CI4MS: Deactivated User Session Bypass (active=0)

{
  "id": "1c6a0f4ace8baa29dbb58609fe3b4baf8194bdc0064312d5045b0bd545ea4468",
  "url": "https://osv.dev/vulnerability/CVE-2026-41891",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CI4MS: Deactivated User Session Bypass (active=0)",
    "summary": "CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. From version 0.26.0 to before version 0.31.8.0, the auth filter has the deactivated/banned user check commented out. This issue has been patched in version 0.31.8.0.",
    "evidence": "osv:CVE-2026-41891",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-41891",
      "aliases": [
        "CVE-2026-41891",
        "GHSA-5hfv-c864-qcq9"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ci4-cms-erp/ci4ms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "fb60f5a96a76953c1c24740fc5d616c765d0aec6"
                },
                {
                  "fixed": "44f10f8dcbdced7cf38221b764d674e3469563e9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.26.0"
                      },
                      {
                        "fixed": "0.31.8.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "44f10f8dcbdced7cf38221b764d674e3469563e9"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "0.31.8.0"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.31.8.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.31.7.0",
            "0.31.6.0",
            "0.31.5.0",
            "0.31.4.0",
            "0.31.3.0",
            "0.31.2.0",
            "0.31.1.0",
            "0.31.0.0",
            "0.28.6.0",
            "0.28.5.0",
            "0.28.4.0",
            "0.28.3.0",
            "0.28.0.0",
            "0.27.0.0",
            "0.26.3.4",
            "0.26.3.3",
            "0.26.3.2",
            "0.26.3.1",
            "0.26.3.0",
            "0.26.2.0",
            "0.26.1.0",
            "0.26.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41891.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.970831938Z",
      "provider": "osv",
      "references": [
        "https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.8.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41891.json",
        "https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-5hfv-c864-qcq9",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-41891"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-613"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41891.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-41891",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 494778,
  "published_at": "2026-05-07T03:24:43.94+00:00"
}