{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "5.0.0"
              },
              {
                "fixed": "5.5.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "2ff182ba39ddea19fa1615bd3733f734b5e53842"
            },
            {
              "fixed": "22fbaedb7e6dd61f5def10829ba7bd7e73e0dcc9"
            },
            {
              "fixed": "a40808f5c2ee5d42bb597fb6ffbe0de0ce8e4d20"
            },
            {
              "fixed": "cd7abb68d298f3443eafd43fa2d0c7ad0f933d0e"
            },
            {
              "fixed": "e0dca5f709adc21b36f5549df2c0619bc59da56c"
            },
            {
              "fixed": "81689c7f1471beb1fa9fb9c686f6f071f8671c3c"
            }
          ],
          "repo": "https://github.com/getkirby/kirby",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9vx2-j98c-p72w"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75594.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "4.9.5"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Kirby is an open-source content management system. Prior to 4.9.5 and 5.5.2, depending on the release line, Kirby's media handler in src/Cms/Media.php allowed Kirby\\Cms\\Media::thumb() to append a path-bearing filename to a validated parent media directory. On nginx, PHP's built-in server, or Apache with AllowEncodedSlashes enabled, a remote attacker could submit encoded slash characters such as %2f in the filename and traverse outside the parent's media directory. Differences between responses for existing and nonexistent thumbnail configurations disclosed whether an arbitrary .json file existed, and a .json file containing a valid filename key could cause the referenced image to be returned and the job file to be deleted. The related file::version path in src/Filesystem/Asset.php also accepted ../ sequences outside the intended index root. This issue is fixed in versions 4.9.5 and 5.5.2.",
  "id": "CVE-2026-75594",
  "modified": "2026-09-03T03:31:02.653488816Z",
  "published": "2026-08-31T20:53:00.338Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/getkirby/kirby/releases/tag/4.9.5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/getkirby/kirby/releases/tag/5.5.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75594.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/getkirby/kirby/security/advisories/GHSA-9vx2-j98c-p72w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75594"
    },
    {
      "type": "FIX",
      "url": "https://github.com/getkirby/kirby/commit/22fbaedb7e6dd61f5def10829ba7bd7e73e0dcc9"
    },
    {
      "type": "FIX",
      "url": "https://github.com/getkirby/kirby/commit/a40808f5c2ee5d42bb597fb6ffbe0de0ce8e4d20"
    },
    {
      "type": "FIX",
      "url": "https://github.com/getkirby/kirby/commit/cd7abb68d298f3443eafd43fa2d0c7ad0f933d0e"
    },
    {
      "type": "FIX",
      "url": "https://github.com/getkirby/kirby/commit/e0dca5f709adc21b36f5549df2c0619bc59da56c"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Kirby: Access to image files and limited access to JSON files outside of the site root via path traversal in the media handling"
}