High
filebrowser before v2.63.21 Access Rule Bypass via Path Canonicalization
Type: advisorySources: OSV
filebrowser versions before v2.63.21 fail to canonicalize paths before evaluating access rules, allowing authenticated users to bypass administrator-defined deny rules using case-variant or backslash-separated paths. Attackers can request files with alternate path representations that match no rule but resolve to the same filesystem object, gaining unauthorized access to denied files within their scope.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-72835
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 11:01 UTC · Revision 1
Source evidence
filebrowser before v2.63.21 Access Rule Bypass via Path Canonicalization
core-osv · Original sourcePublished 14 Aug 2026, 11:35 UTC
filebrowser versions before v2.63.21 fail to canonicalize paths before evaluating access rules, allowing authenticated users to bypass administrator-defined deny rules using case-variant or backslash-separated paths. Attackers can request files with alternate path representations that match no rule but resolve to the same filesystem object, gaining unauthorized access to denied files within their scope.
osv:CVE-2026-72835
Complete source record
{
"id": "80b4ba7c2b31e95c45861fed6390b4fac852b8d7958252224a1d7d26b83c6de4",
"url": "https://osv.dev/vulnerability/CVE-2026-72835",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "filebrowser before v2.63.21 Access Rule Bypass via Path Canonicalization",
"summary": "filebrowser versions before v2.63.21 fail to canonicalize paths before evaluating access rules, allowing authenticated users to bypass administrator-defined deny rules using case-variant or backslash-separated paths. Attackers can request files with alternate path representations that match no rule but resolve to the same filesystem object, gaining unauthorized access to denied files within their scope.",
"evidence": "osv:CVE-2026-72835",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-72835",
"aliases": [
"CVE-2026-72835",
"GHSA-fgm5-pw99-w2p7"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/filebrowser/filebrowser",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "f6fb8f6bf52d714b2215534033a3c96316069efc"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "2.63.21"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "0"
},
{
"fixed": "2.63.21"
}
],
"source": "DESCRIPTION"
}
]
}
}
],
"versions": [
"v2.63.20",
"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",
"v2.60.0",
"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",
"v2.52.0",
"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",
"v1.4.6",
"v1.4.5",
"v1.4.4",
"v1.4.3",
"v1.4.0",
"v1.3.12",
"v1.3.11",
"v1.3.10",
"v1.3.9",
"v1.3.8",
"v1.3.7",
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"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-2026-72835.json"
}
}
],
"modified": "2026-10-28T02:30:28.154830199Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72835.json",
"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-fgm5-pw99-w2p7",
"https://nvd.nist.gov/vuln/detail/CVE-2026-72835",
"https://www.vulncheck.com/advisories/filebrowser-before-access-rule-bypass-via-path-canonicalization"
],
"provider_metadata": {
"cwe_ids": [
"CWE-41"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72835.json"
}
},
"related_cves": [
{
"value": "CVE-2026-72835",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 494809,
"published_at": "2026-08-14T11:35:40.774+00:00"
}