{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-75592",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-08-17T23:49:03.448Z",
        "datePublished": "2026-08-31T20:49:41.341Z",
        "dateUpdated": "2026-08-31T20:49:41.341Z"
    },
    "containers": {
        "cna": {
            "title": "Kirby: Access to image files outside of the site root via path traversal in the media handling",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-22",
                            "lang": "en",
                            "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 6.9,
                        "baseSeverity": "MEDIUM",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/getkirby/kirby/security/advisories/GHSA-6j4c-mgqr-qv76",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/getkirby/kirby/security/advisories/GHSA-6j4c-mgqr-qv76"
                },
                {
                    "name": "https://github.com/getkirby/kirby/commit/2b6fab950bc89d505ea89576bf71c8de614cc3b2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/getkirby/kirby/commit/2b6fab950bc89d505ea89576bf71c8de614cc3b2"
                },
                {
                    "name": "https://github.com/getkirby/kirby/commit/e0dca5f709adc21b36f5549df2c0619bc59da56c",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/getkirby/kirby/commit/e0dca5f709adc21b36f5549df2c0619bc59da56c"
                },
                {
                    "name": "https://github.com/getkirby/kirby/releases/tag/4.9.5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/getkirby/kirby/releases/tag/4.9.5"
                },
                {
                    "name": "https://github.com/getkirby/kirby/releases/tag/5.5.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/getkirby/kirby/releases/tag/5.5.2"
                }
            ],
            "affected": [
                {
                    "vendor": "getkirby",
                    "product": "kirby",
                    "versions": [
                        {
                            "version": "< 4.9.5",
                            "status": "affected"
                        },
                        {
                            "version": ">= 5.0.0, < 5.5.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-31T20:49:41.341Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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 used incomplete filesystem containment checks in src/Filesystem/Dir.php and src/Filesystem/F.php through Kirby\\Filesystem\\Dir::realpath() and Kirby\\Filesystem\\F::realpath(). The checks accepted a sibling directory whose path shared the intended root's string prefix, such as /var/www/site2 next to /var/www/site, because they did not require an exact match or a DIRECTORY_SEPARATOR boundary. A remote attacker could use Kirby\\Cms\\Media::thumb() to create and access thumbnails from image files in a PHP-readable sibling directory when that directory contained a valid .json thumbnail job file, potentially exposing staging sites, backups, or other internal sites and deleting the job file during processing. This issue is fixed in versions 4.9.5 and 5.5.2."
                }
            ],
            "source": {
                "advisory": "GHSA-6j4c-mgqr-qv76",
                "discovery": "UNKNOWN"
            }
        }
    }
}