Critical
rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode
Type: advisorySources: OSV
rsync before 3.5.0 contains a path confinement bypass vulnerability that allows remote clients to escape the intended inner-module root confinement by constructing paths that resolve outside the chroot boundary when the module root contains a /./ boundary marker. Attackers can exploit improper handling of the /./ notation or forge delta-basis transfers referencing xname paths that cross the /./ boundary to gain unauthorized read or write access to files outside the module's subtree.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-53793
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 04:59 UTC · Revision 1
Source evidence
rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode
core-osv · Original sourcePublished 13 Aug 2026, 14:38 UTC
rsync before 3.5.0 contains a path confinement bypass vulnerability that allows remote clients to escape the intended inner-module root confinement by constructing paths that resolve outside the chroot boundary when the module root contains a /./ boundary marker. Attackers can exploit improper handling of the /./ notation or forge delta-basis transfers referencing xname paths that cross the /./ boundary to gain unauthorized read or write access to files outside the module's subtree.
osv:CVE-2026-53793
Complete source record
{
"id": "c8e75c50794257edc21b47392ef71c6d7f88f70e44154abaf5b1af99b5506ccb",
"url": "https://osv.dev/vulnerability/CVE-2026-53793",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode",
"summary": "rsync before 3.5.0 contains a path confinement bypass vulnerability that allows remote clients to escape the intended inner-module root confinement by constructing paths that resolve outside the chroot boundary when the module root contains a /./ boundary marker. Attackers can exploit improper handling of the /./ notation or forge delta-basis transfers referencing xname paths that cross the /./ boundary to gain unauthorized read or write access to files outside the module's subtree.",
"evidence": "osv:CVE-2026-53793",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-53793",
"aliases": [
"CVE-2026-53793",
"GHSA-wj7w-vh23-mm44"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/rsyncproject/rsync",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "471e17dc0d68233db84db11be82c9f62f4661214"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"last_affected": "3.4.4"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"fixed": "471e17dc0d68233db84db11be82c9f62f4661214"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v3.5.0"
}
]
}
}
],
"versions": [
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53793.json"
}
}
],
"modified": "2026-10-28T02:30:26.005705358Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53793.json",
"https://github.com/RsyncProject/rsync/releases/tag/v3.5.0",
"https://github.com/RsyncProject/rsync/security/advisories/GHSA-wj7w-vh23-mm44",
"https://nvd.nist.gov/vuln/detail/CVE-2026-53793",
"https://www.vulncheck.com/advisories/rsync-path-confinement-bypass-via-boundary-marker-in-chroot-mode",
"https://github.com/RsyncProject/rsync"
],
"provider_metadata": {
"cwe_ids": [
"CWE-59"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53793.json"
}
},
"related_cves": [
{
"value": "CVE-2026-53793",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 492628,
"published_at": "2026-08-13T14:38:42.288+00:00"
}