High
Rsync < 3.4.3 Symlink Race Condition via Path-Based Syscalls
Type: advisorySources: OSV
Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module. Attackers with local filesystem access can exploit the timing window between path resolution and syscall execution by swapping symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files outside the intended module boundary on rsync daemons configured with 'use chroot = no'.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-43619
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 03:52 UTC · Revision 1
Source evidence
Rsync < 3.4.3 Symlink Race Condition via Path-Based Syscalls
core-osv · Original sourcePublished 20 May 2026, 00:49 UTC
Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module. Attackers with local filesystem access can exploit the timing window between path resolution and syscall execution by swapping symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files outside the intended module boundary on rsync daemons configured with 'use chroot = no'.
osv:CVE-2026-43619
Complete source record
{
"id": "07418ae5bd87abef13d8a0634f5e340ec318ab0710539c38e282068c75b94d25",
"url": "https://osv.dev/vulnerability/CVE-2026-43619",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Rsync < 3.4.3 Symlink Race Condition via Path-Based Syscalls",
"summary": "Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module. Attackers with local filesystem access can exploit the timing window between path resolution and syscall execution by swapping symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files outside the intended module boundary on rsync daemons configured with 'use chroot = no'.",
"evidence": "osv:CVE-2026-43619",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-43619",
"aliases": [
"CVE-2026-43619",
"GHSA-4h9m-w5ff-j735"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://git.samba.org/rsync.git/",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "de3cc03b03be153092f266aa1117b4706947ed07"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "3.4.2"
}
],
"source": "CPE_RANGE"
}
]
}
},
{
"repo": "https://github.com/rsyncproject/rsync",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "2c7777aaa62abeb1bca192da345e6e8c685e872a"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "3.4.2"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "2c7777aaa62abeb1bca192da345e6e8c685e872a"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v3.4.3"
}
]
}
}
],
"versions": [
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"v3.0.1",
"v3.0.1pre3",
"v3.0.1pre2",
"v3.0.1pre1",
"v3.0.0",
"v3.0.0pre10",
"v3.0.0pre9",
"v3.0.0pre8",
"v3.0.0pre7",
"v3.0.0pre6",
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"v2.6.2",
"v2.6.2pre1",
"v2.6.1",
"v2.6.1pre2",
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"v2.5.0",
"v2.4.7pre4",
"v2.4.7pre2",
"mbp_bk_export0",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43619.json"
}
}
],
"modified": "2026-10-28T02:30:32.847251772Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43619.json",
"https://github.com/RsyncProject/rsync/releases/tag/v3.4.3",
"https://github.com/RsyncProject/rsync/security/advisories/GHSA-4h9m-w5ff-j735",
"https://nvd.nist.gov/vuln/detail/CVE-2026-43619",
"https://www.vulncheck.com/advisories/rsync-symlink-race-condition-via-path-based-syscalls",
"https://github.com/RsyncProject/rsync"
],
"provider_metadata": {
"cwe_ids": [
"CWE-367",
"CWE-59"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43619.json"
}
},
"related_cves": [
{
"value": "CVE-2026-43619",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 500139,
"published_at": "2026-05-20T00:49:14.709+00:00"
}