CVE-2026-75592 (GCVE-0-2026-75592)
Vulnerability from cvelistv5
Published
2026-08-31 20:49
Modified
2026-09-01 13:41
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Summary
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.
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-75592",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-01T13:41:08.534163Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-01T13:41:40.500Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "kirby",
"vendor": "getkirby",
"versions": [
{
"status": "affected",
"version": "\u003c 4.9.5"
},
{
"status": "affected",
"version": "\u003e= 5.0.0, \u003c 5.5.2"
}
]
}
],
"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\u0027s 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\u0027s 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."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "HIGH",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"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",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-22",
"description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-31T20:49:41.341Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"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"
}
],
"source": {
"advisory": "GHSA-6j4c-mgqr-qv76",
"discovery": "UNKNOWN"
},
"title": "Kirby: Access to image files outside of the site root via path traversal in the media handling"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-75592",
"datePublished": "2026-08-31T20:49:41.341Z",
"dateReserved": "2026-08-17T23:49:03.448Z",
"dateUpdated": "2026-09-01T13:41:40.500Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-75592\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-01T13:41:08.534163Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-01T13:41:19.727Z\"}}], \"cna\": {\"title\": \"Kirby: Access to image files outside of the site root via path traversal in the media handling\", \"source\": {\"advisory\": \"GHSA-6j4c-mgqr-qv76\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 6.9, \"attackVector\": \"NETWORK\", \"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\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"HIGH\", \"vulnConfidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"getkirby\", \"product\": \"kirby\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 4.9.5\"}, {\"status\": \"affected\", \"version\": \"\u003e= 5.0.0, \u003c 5.5.2\"}]}], \"references\": [{\"url\": \"https://github.com/getkirby/kirby/security/advisories/GHSA-6j4c-mgqr-qv76\", \"name\": \"https://github.com/getkirby/kirby/security/advisories/GHSA-6j4c-mgqr-qv76\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/getkirby/kirby/commit/2b6fab950bc89d505ea89576bf71c8de614cc3b2\", \"name\": \"https://github.com/getkirby/kirby/commit/2b6fab950bc89d505ea89576bf71c8de614cc3b2\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/getkirby/kirby/commit/e0dca5f709adc21b36f5549df2c0619bc59da56c\", \"name\": \"https://github.com/getkirby/kirby/commit/e0dca5f709adc21b36f5549df2c0619bc59da56c\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/getkirby/kirby/releases/tag/4.9.5\", \"name\": \"https://github.com/getkirby/kirby/releases/tag/4.9.5\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/getkirby/kirby/releases/tag/5.5.2\", \"name\": \"https://github.com/getkirby/kirby/releases/tag/5.5.2\", \"tags\": [\"x_refsource_MISC\"]}], \"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\u0027s 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\u0027s 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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-22\", \"description\": \"CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-08-31T20:49:41.341Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-75592\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-01T13:41:40.500Z\", \"dateReserved\": \"2026-08-17T23:49:03.448Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-08-31T20:49:41.341Z\", \"assignerShortName\": \"GitHub_M\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…