High
File Browser before 2.63.20 Privilege Escalation via Proxy Authentication
Type: advisorySources: OSV
File Browser versions before 2.63.20 fail to honor the createUserDir isolation in proxy and hook authentication auto-provisioning paths. Attackers with valid upstream-authenticated credentials can read, modify, delete, and share files belonging to other users by exploiting the server root scope assignment.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-72837
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 07:55 UTC · Revision 1
Source evidence
File Browser before 2.63.20 Privilege Escalation via Proxy Authentication
core-osv · Original sourcePublished 14 Aug 2026, 11:35 UTC
File Browser versions before 2.63.20 fail to honor the createUserDir isolation in proxy and hook authentication auto-provisioning paths. Attackers with valid upstream-authenticated credentials can read, modify, delete, and share files belonging to other users by exploiting the server root scope assignment.
osv:CVE-2026-72837
Complete source record
{
"id": "d7b0746882caee397b1899873651a4d87d00995dd15c67764a2eac2b389e97a0",
"url": "https://osv.dev/vulnerability/CVE-2026-72837",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "File Browser before 2.63.20 Privilege Escalation via Proxy Authentication",
"summary": "File Browser versions before 2.63.20 fail to honor the createUserDir isolation in proxy and hook authentication auto-provisioning paths. Attackers with valid upstream-authenticated credentials can read, modify, delete, and share files belonging to other users by exploiting the server root scope assignment.",
"evidence": "osv:CVE-2026-72837",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-72837",
"aliases": [
"CVE-2026-72837",
"GHSA-j7jh-37pf-mf8h"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/filebrowser/filebrowser",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "50125a5d21c9f5e9a78db80d77a26139614ce72e"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "2.63.20"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "0"
},
{
"fixed": "2.63.20"
}
],
"source": "DESCRIPTION"
}
]
}
}
],
"versions": [
"v2.63.19",
"v2.63.18",
"v2.63.17",
"v2.63.16",
"v2.63.15",
"v2.63.14",
"v2.63.13",
"v2.63.12",
"v2.63.11",
"v2.63.10",
"v2.63.9",
"v2.63.8",
"v2.63.7",
"v2.63.6",
"v2.63.5",
"v2.63.4",
"v2.63.3",
"v2.63.1",
"v2.63.0",
"v2.62.2",
"v2.62.1",
"v2.62.0",
"v2.61.2",
"v2.61.1",
"v2.61.0",
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"v2.59.0",
"v2.58.0",
"v2.57.1",
"v2.57.0",
"v2.56.0",
"v2.55.0",
"v2.54.0",
"v2.53.1",
"v2.53.0",
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"v2.51.2",
"v2.51.1",
"v2.51.0",
"v2.50.0",
"v2.49.0",
"v2.48.2",
"v2.48.1",
"v2.48.0",
"v2.47.0",
"v2.46.1",
"v2.46.0",
"v2.45.3",
"v2.45.2",
"v2.45.1",
"v2.45.0",
"v2.44.2",
"v2.44.1",
"v2.44.0",
"v2.43.0",
"v2.42.5",
"v2.42.4",
"v2.42.3",
"v2.42.2",
"v2.42.1",
"v2.42.0",
"v2.41.0",
"v2.40.2",
"v2.40.1",
"v2.40.0",
"v2.39.0",
"v2.38.0",
"v2.37.0",
"v2.36.3",
"v2.36.2",
"v2.36.1",
"v2.36.0",
"v2.35.0",
"v2.34.2",
"v2.34.1",
"v2.34.0",
"v2.33.10",
"v2.33.9",
"v2.33.8",
"v2.33.7",
"v2.33.6",
"v2.33.5",
"v2.33.4",
"v2.33.3",
"v2.33.2",
"v2.33.1",
"v2.33.0",
"v2.32.3",
"v2.32.2",
"v2.32.1",
"v2.32.0",
"v2.31.2",
"v2.31.1",
"v2.31.0",
"v2.30.0",
"v2.29.0",
"v2.28.0",
"v2.27.0",
"v2.26.0",
"v2.25.0",
"v2.24.2",
"v2.24.1",
"v2.24.0",
"v2.23.0",
"v2.22.4",
"v2.22.3",
"v2.22.2",
"v2.22.1",
"v2.22.0",
"v2.21.1",
"v2.21.0",
"v2.20.1",
"v2.20.0",
"v2.19.0",
"v2.18.0",
"v2.17.2",
"v2.17.1",
"v2.17.0",
"v2.16.1",
"v2.16.0",
"v2.15.0",
"v2.14.1",
"v2.14.0",
"v2.13.0",
"v2.12.1",
"v2.12.0",
"v2.11.0",
"v2.10.0",
"v2.9.0",
"v2.8.0",
"v2.7.0",
"v2.6.2",
"v2.6.1",
"v2.6.0",
"v2.5.0",
"v2.4.0",
"v2.3.0",
"v2.2.0",
"v2.1.2",
"v2.1.1",
"v2.1.0",
"v2.0.16",
"v2.0.15",
"v2.0.14",
"v2.0.13",
"v2.0.12",
"v2.0.11",
"v2.0.10",
"v2.0.9",
"v2.0.8",
"v2.0.7",
"v2.0.6",
"v2.0.5",
"v2.0.4",
"v2.0.3",
"v2.0.2",
"v2.0.1",
"v2.0.0",
"v2.0.0-rc.2",
"v2.0.0-rc.1",
"v1.11.0",
"v1.10.0",
"v1.9.0",
"v1.8.0",
"v1.7.1",
"v1.7.0",
"v1.6.0",
"v1.5.5",
"v1.5.4",
"v1.5.3",
"v1.5.2",
"v1.5.1",
"v1.5.0",
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"v1.4.5",
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"v1.4.3",
"v1.4.0",
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"v1.3.11",
"v1.3.10",
"v1.3.9",
"v1.3.8",
"v1.3.7",
"v1.3.6",
"v1.3.5",
"v1.3.4",
"v1.3.3",
"v1.3.2",
"v1.3.1",
"v1.3.0",
"v1.2.9",
"v1.2.8",
"v1.2.7",
"v1.2.6",
"v1.2.5",
"v1.2.4",
"v1.2.3",
"v1.2.2",
"v1.2.1",
"v1.2.0",
"v1.1.1",
"v1.1.0",
"v1.0.2",
"v1.0.1",
"v1.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72837.json"
}
}
],
"modified": "2026-10-28T02:30:33.848678628Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72837.json",
"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-j7jh-37pf-mf8h",
"https://nvd.nist.gov/vuln/detail/CVE-2026-72837",
"https://www.vulncheck.com/advisories/file-browser-before-privilege-escalation-via-proxy-authentication"
],
"provider_metadata": {
"cwe_ids": [
"CWE-284"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72837.json"
}
},
"related_cves": [
{
"value": "CVE-2026-72837",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 501006,
"published_at": "2026-08-14T11:35:42.191+00:00"
}