Security advisory

{
  "id": "c5eaff437d0d9961333286bc3cb543bb28c5033e61b241a13b6226189a132593",
  "url": "https://osv.dev/vulnerability/CVE-2026-29905",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-29905",
    "summary": "Kirby CMS through 5.1.4 allows an authenticated user with 'Editor' permissions to cause a persistent Denial of Service (DoS) via a malformed image upload. The application fails to properly validate the return value of the PHP getimagesize() function. When the system attempts to process this file for metadata or thumbnail generation, it triggers a fatal TypeError.",
    "evidence": "osv:CVE-2026-29905",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-29905",
      "aliases": [
        "CVE-2026-29905"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/getkirby/kirby",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a4784a42b78d551d31ea8c364907b7fa722386fe"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "5.1.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a4784a42b78d551d31ea8c364907b7fa722386fe"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "5.2.0-rc.1"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.8.0",
            "5.1.0-rc.1",
            "5.0.0",
            "4.7.2",
            "4.7.1",
            "4.7.0",
            "4.6.1",
            "4.6.0",
            "4.5.0",
            "4.4.1",
            "4.4.0",
            "4.3.1",
            "4.3.0",
            "4.2.0",
            "4.1.2",
            "4.1.1",
            "4.1.0",
            "3.9.8",
            "4.0.3",
            "4.0.2",
            "4.0.1",
            "4.0.0",
            "3.9.7",
            "3.9.6.1",
            "3.9.6",
            "3.8.4",
            "3.9.6-rc.1",
            "3.9.5",
            "3.9.4",
            "3.9.3",
            "3.9.2",
            "3.9.1",
            "3.9.0",
            "3.8.3",
            "3.8.2",
            "3.8.1.1",
            "3.8.1",
            "3.8.0",
            "3.7.5",
            "3.7.4",
            "3.7.3",
            "3.6.6",
            "3.7.4-rc.1",
            "3.5.7.1",
            "3.7.2.1",
            "3.7.2",
            "3.7.1",
            "3.7.0.2",
            "3.7.0.1",
            "3.7.0",
            "3.6.5",
            "3.6.4",
            "3.6.3.1",
            "3.6.3",
            "3.6.2",
            "3.6.2-rc.3",
            "3.6.2-rc.2",
            "3.6.2-rc.1",
            "3.6.1.1",
            "3.6.0",
            "3.5.7",
            "3.5.6",
            "3.5.5",
            "3.5.4",
            "3.5.3.1",
            "3.5.3",
            "3.5.2",
            "3.5.1",
            "3.5.1-rc.1",
            "3.5.0",
            "3.5.0-rc.7",
            "3.5.0-rc.6",
            "3.5.0-rc.5",
            "3.5.0-rc.4",
            "3.5.0-rc.3",
            "3.5.0-rc.2",
            "3.5.0-rc.1",
            "3.4.2",
            "3.4.1",
            "3.4.0",
            "3.3.6",
            "3.3.5",
            "3.3.4",
            "3.3.3",
            "3.3.2",
            "3.3.1",
            "3.3.0",
            "3.2.5",
            "3.2.5-rc.2",
            "3.2.5-rc.1",
            "3.2.3-rc.1",
            "3.2.2",
            "3.2.1",
            "3.2.1-rc.1",
            "3.2.0",
            "3.2.0-rc.4",
            "3.2.0-rc.3",
            "3.2.0-rc.2",
            "3.2.0-rc.1",
            "3.1.4",
            "3.1.4-rc.1",
            "3.1.3",
            "3.1.3-rc.1",
            "3.1.2",
            "3.1.2-rc.1",
            "3.1.1",
            "3.1.0",
            "3.1.0-rc.1",
            "3.0.3",
            "3.0.3-rc.3",
            "3.0.3-rc.2",
            "3.0.3-rc.1",
            "3.0.2",
            "3.0.2-rc.1",
            "3.0.1",
            "3.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-29905.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:28.751267911Z",
      "provider": "osv",
      "references": [
        "https://drive.google.com/file/d/1MwvvSYIwnC8kOIzjycGMQZw4d2K2ef8h/view?usp=sharing",
        "https://github.com/getkirby/kirby/releases/tag/5.2.0-rc.1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29905.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-29905",
        "https://github.com/Stalin-143/CVE-2026-29905"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29905.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-29905",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 495464,
  "published_at": "2026-03-26T00:00:00+00:00"
}