CVE-2026-81891

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-81891
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81891.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-81891
Aliases
Published
2026-08-31T20:33:22.283Z
Modified
2026-09-03T03:30:16.414414334Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
elFinder: ZIP extraction bypasses uploadDeny MIME filter allowing PHP file upload (RCE)
Details

elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.70, checkExtractItems() in php/elFinderVolumeDriver.class.php calls mimetypeInternalDetect() without passing the result through mimeTypeNormalize(). Because the .phtml, .phar, .php5, and .php3 extensions are absent from mime.types, the staticMimeMap entries that map them to text/x-php are not applied, and allowPutMime() permits extraction even when uploadDeny blocks text/x-php. An attacker with ZIP upload permission can extract PHP-executable files into a web-accessible files/ directory and achieve remote code execution when the server executes those extensions. This issue is fixed in version 2.1.70.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81891.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-434"
    ]
}
References

Affected packages

Git / github.com/studio-42/elfinder

Affected ranges

Type
GIT
Repo
https://github.com/studio-42/elfinder
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
191372c1bbebbd36fb55af79a84b9984861390ff
Fixed
dd73e702820c146a192969800ee674ecdb208365
Fixed
e7ea668fd569fc9903fb1c431d47d58f2daad2f2
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.1.70"
        }
    ]
}

Affected versions

1.*
1.0.1
2.*
2.0-beta
2.1.0
2.1.1
2.1.10
2.1.11
2.1.12
2.1.13
2.1.14
2.1.15
2.1.16
2.1.17
2.1.18
2.1.19
2.1.2
2.1.20
2.1.21
2.1.22
2.1.23
2.1.24
2.1.25
2.1.26
2.1.27
2.1.28
2.1.29
2.1.3
2.1.30
2.1.31
2.1.32
2.1.33
2.1.34
2.1.35
2.1.36
2.1.37
2.1.38
2.1.39
2.1.4
2.1.40
2.1.41
2.1.42
2.1.43
2.1.44
2.1.45
2.1.46
2.1.47
2.1.48
2.1.49
2.1.5
2.1.50
2.1.51
2.1.52
2.1.53
2.1.54
2.1.55
2.1.56
2.1.57
2.1.58
2.1.59
2.1.6
2.1.60
2.1.61
2.1.62
2.1.63
2.1.64
2.1.65
2.1.66
2.1.67
2.1.68
2.1.69
2.1.7
2.1.8
2.1.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81891.json"