CVE-2026-71415 (GCVE-0-2026-71415)
Vulnerability from cvelistv5
Published
2026-08-31 20:46
Modified
2026-09-03 18:02
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-862 - Missing Authorization
Summary
Kirby is an open-source content management system. From 5.0.0 until 5.5.2, Kirby's REST API chunk upload handler in src/Api/Upload.php did not run the relevant upload authorization preflight in Kirby\Api\Upload::process() before Kirby\Api\Upload::processChunk() persisted chunk data. An authenticated user with the access.panel permission enabled but with files.create, files.replace, and user/users.update permissions disabled could submit requests with an Upload-Length header and leave unfinished chunks in site/cache/.uploads for 24 hours. Repeating this process could consume attacker-controlled temporary storage, prevent other users from uploading files, or prevent site logic from storing data, although final permission checks still prevented unauthorized files from reaching the content or site/accounts directories. This issue is fixed in version 5.5.2.
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-71415",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-03T18:02:02.883589Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-03T18:02:09.849Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "kirby",
"vendor": "getkirby",
"versions": [
{
"status": "affected",
"version": "\u003e= 5.0.0, \u003c 5.5.2"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Kirby is an open-source content management system. From 5.0.0 until 5.5.2, Kirby\u0027s REST API chunk upload handler in src/Api/Upload.php did not run the relevant upload authorization preflight in Kirby\\Api\\Upload::process() before Kirby\\Api\\Upload::processChunk() persisted chunk data. An authenticated user with the access.panel permission enabled but with files.create, files.replace, and user/users.update permissions disabled could submit requests with an Upload-Length header and leave unfinished chunks in site/cache/.uploads for 24 hours. Repeating this process could consume attacker-controlled temporary storage, prevent other users from uploading files, or prevent site logic from storing data, although final permission checks still prevented unauthorized files from reaching the content or site/accounts directories. This issue is fixed in version 5.5.2."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-862",
"description": "CWE-862: Missing Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-31T20:46:02.280Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/getkirby/kirby/security/advisories/GHSA-67mx-6wf2-92xp",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/getkirby/kirby/security/advisories/GHSA-67mx-6wf2-92xp"
},
{
"name": "https://github.com/getkirby/kirby/pull/8296",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/getkirby/kirby/pull/8296"
},
{
"name": "https://github.com/getkirby/kirby/commit/37e206f3ed40ad3fab2e47e055ccb19e9c207dab",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/getkirby/kirby/commit/37e206f3ed40ad3fab2e47e055ccb19e9c207dab"
},
{
"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-67mx-6wf2-92xp",
"discovery": "UNKNOWN"
},
"title": "Kirby: File upload permissions are not checked during processing of chunk data"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-71415",
"datePublished": "2026-08-31T20:46:02.280Z",
"dateReserved": "2026-08-06T16:28:51.181Z",
"dateUpdated": "2026-09-03T18:02:09.849Z",
"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-2026-71415\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-03T18:02:02.883589Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-03T18:02:06.939Z\"}}], \"cna\": {\"title\": \"Kirby: File upload permissions are not checked during processing of chunk data\", \"source\": {\"advisory\": \"GHSA-67mx-6wf2-92xp\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 7.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"getkirby\", \"product\": \"kirby\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 5.0.0, \u003c 5.5.2\"}]}], \"references\": [{\"url\": \"https://github.com/getkirby/kirby/security/advisories/GHSA-67mx-6wf2-92xp\", \"name\": \"https://github.com/getkirby/kirby/security/advisories/GHSA-67mx-6wf2-92xp\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/getkirby/kirby/pull/8296\", \"name\": \"https://github.com/getkirby/kirby/pull/8296\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/getkirby/kirby/commit/37e206f3ed40ad3fab2e47e055ccb19e9c207dab\", \"name\": \"https://github.com/getkirby/kirby/commit/37e206f3ed40ad3fab2e47e055ccb19e9c207dab\", \"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. From 5.0.0 until 5.5.2, Kirby\u0027s REST API chunk upload handler in src/Api/Upload.php did not run the relevant upload authorization preflight in Kirby\\\\Api\\\\Upload::process() before Kirby\\\\Api\\\\Upload::processChunk() persisted chunk data. An authenticated user with the access.panel permission enabled but with files.create, files.replace, and user/users.update permissions disabled could submit requests with an Upload-Length header and leave unfinished chunks in site/cache/.uploads for 24 hours. Repeating this process could consume attacker-controlled temporary storage, prevent other users from uploading files, or prevent site logic from storing data, although final permission checks still prevented unauthorized files from reaching the content or site/accounts directories. This issue is fixed in version 5.5.2.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-862\", \"description\": \"CWE-862: Missing Authorization\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-08-31T20:46:02.280Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-71415\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-03T18:02:09.849Z\", \"dateReserved\": \"2026-08-06T16:28:51.181Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-08-31T20:46:02.280Z\", \"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…