File Browser's Signup Grants Execution Permissions When Default Permissions Includes Execution
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to version 2.62.2, the signupHandler in File Browser applies default user permissions via d.settings.Defaults.Apply(user), then strips only Admin. The Execute permission and Commands list from the default user template are not stripped. When an administrator has enabled signup, server-side execution, and set Execute=true in the default user template, any unauthenticated user who self-registers inherits shell execution capabilities and can run arbitrary commands on the server. This issue has been patched in version 2.62.2.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-34528
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 22:22 UTC · Revision 1
Source evidence
File Browser's Signup Grants Execution Permissions When Default Permissions Includes Execution
core-osv · Original sourcePublished 1 Apr 2026, 20:39 UTC
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to version 2.62.2, the signupHandler in File Browser applies default user permissions via d.settings.Defaults.Apply(user), then strips only Admin. The Execute permission and Commands list from the default user template are not stripped. When an administrator has enabled signup, server-side execution, and set Execute=true in the default user template, any unauthenticated user who self-registers inherits shell execution capabilities and can run arbitrary commands on the server. This issue has been patched in version 2.62.2.
osv:CVE-2026-34528
Complete source record
{
"id": "ca2bf150f382013f917bbd5c074596fb7de54fd7b8b896a28f9415b60dcfebd1",
"url": "https://osv.dev/vulnerability/CVE-2026-34528",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "File Browser's Signup Grants Execution Permissions When Default Permissions Includes Execution",
"summary": "File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to version 2.62.2, the signupHandler in File Browser applies default user permissions via d.settings.Defaults.Apply(user), then strips only Admin. The Execute permission and Commands list from the default user template are not stripped. When an administrator has enabled signup, server-side execution, and set Execute=true in the default user template, any unauthenticated user who self-registers inherits shell execution capabilities and can run arbitrary commands on the server. This issue has been patched in version 2.62.2.",
"evidence": "osv:CVE-2026-34528",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-34528",
"aliases": [
"CVE-2026-34528",
"GHSA-x8jc-jvqm-pm3f",
"GO-2026-5747"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/filebrowser/filebrowser",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "860c19ddf58665aafcf976f5299a907738214226"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "2.62.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "860c19ddf58665aafcf976f5299a907738214226"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v2.62.2"
},
{
"cpe": "cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.62.2"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34528.json"
}
}
],
"modified": "2026-10-28T02:30:24.092983134Z",
"provider": "osv",
"references": [
"https://github.com/filebrowser/filebrowser/releases/tag/v2.62.2",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34528.json",
"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-x8jc-jvqm-pm3f",
"https://nvd.nist.gov/vuln/detail/CVE-2026-34528"
],
"provider_metadata": {
"cwe_ids": [
"CWE-269"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34528.json"
}
},
"related_cves": [
{
"value": "CVE-2026-34528",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 490528,
"published_at": "2026-04-01T20:39:32.013+00:00"
}