CVE-2026-71415

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Source
https://cve.org/CVERecord?id=CVE-2026-71415
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71415.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-71415
Aliases
Published
2026-08-31T20:46:02Z
Modified
2026-10-28T02:30:44Z
Severity
  • 7.1 (High) CVSS_V4 - 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 CVSS Calculator
Summary
Kirby: File upload permissions are not checked during processing of chunk data
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71415.json"
}
References

Affected packages

Git / github.com/getkirby/kirby

Affected ranges

Type
GIT
Repo
https://github.com/getkirby/kirby
Events
Introduced
2ff182ba39ddea19fa1615bd3733f734b5e53842
Fixed
81689c7f1471beb1fa9fb9c686f6f071f8671c3c
Fixed
37e206f3ed40ad3fab2e47e055ccb19e9c207dab
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "5.0.0"
                },
                {
                    "fixed": "5.5.2"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "37e206f3ed40ad3fab2e47e055ccb19e9c207dab"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "5.5.2",
            "range": [
                {
                    "fixed": "81689c7f1471beb1fa9fb9c686f6f071f8671c3c"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

5.*
5.0.0
5.0.1
5.0.2
5.0.3
5.0.4
5.1.0
5.1.1
5.1.2
5.1.3
5.1.4
5.2.0
5.2.1
5.2.2
5.2.3
5.3.0
5.3.1
5.3.2
5.3.3
5.4.0
5.4.1
5.4.2
5.4.3
5.4.4
5.5.0
5.5.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71415.json"