Medium
rsync — security advisory
rsync before 3.5.0 contains a newline injection vulnerability in the name-converter uid/gid mapping interface that allows local attackers to forge protocol messages by creating user or group names containing newline characters. Attackers can inject malicious newline characters into names communicated over the pipe-based line-oriented protocol to cause the rsync daemon to process attacker-influenced data as legitimate protocol input, corrupting uid/gid mapping logic.
- Products
- rsync
- Affected versions
- 3.0.9-4ubuntu1, 3.1.0-2, 3.1.0-2ubuntu0.1, 3.1.0-2ubuntu0.2, 3.1.0-2ubuntu0.3, 3.1.0-2ubuntu0.4, 3.1.0-2ubuntu0.4+esm1, 3.1.0-2ubuntu0.4+esm2, 3.1.0-2ubuntu0.4+esm3, 3.1.0-2ubuntu0.4+esm4, 3.1.1-3, 3.1.1-3ubuntu1, 3.1.1-3ubuntu1.1, 3.1.1-3ubuntu1.2, 3.1.1-3ubuntu1.3, 3.1.1-3ubuntu1.3+esm1, 3.1.1-3ubuntu1.3+esm2, 3.1.1-3ubuntu1.3+esm3, 3.1.1-3ubuntu1.3+esm4, 3.1.1-3ubuntu1.3+esm5, 3.1.1-3ubuntu1.3+esm6, 3.1.2-2, 3.1.2-2.1, 3.1.2-2.1ubuntu1, 3.1.2-2.1ubuntu1.1, 3.1.2-2.1ubuntu1.2, 3.1.2-2.1ubuntu1.3, 3.1.2-2.1ubuntu1.4, 3.1.2-2.1ubuntu1.5, 3.1.2-2.1ubuntu1.6, 3.1.2-2.1ubuntu1.6+esm1, 3.1.2-2.1ubuntu1.6+esm2, 3.1.2-2.1ubuntu1.6+esm3, 3.1.2-2.1ubuntu1.6+esm4, 3.1.3-6, 3.1.3-8, 3.1.3-8ubuntu0.1, 3.1.3-8ubuntu0.2, 3.1.3-8ubuntu0.3, 3.1.3-8ubuntu0.4, 3.1.3-8ubuntu0.5, 3.1.3-8ubuntu0.7, 3.1.3-8ubuntu0.8, 3.1.3-8ubuntu0.9, 3.1.3-8ubuntu0.9+esm1, 3.1.3-8ubuntu0.9+esm2, 3.2.3-4ubuntu1, 3.2.3-4ubuntu2, 3.2.3-8ubuntu1, 3.2.3-8ubuntu2, 3.2.3-8ubuntu3, 3.2.3-8ubuntu3.1, 3.2.7-0ubuntu0.22.04.2, 3.2.7-0ubuntu0.22.04.3, 3.2.7-0ubuntu0.22.04.4, 3.2.7-0ubuntu0.22.04.6, 3.2.7-0ubuntu0.22.04.7, 3.2.7-1, 3.2.7-1build1, 3.2.7-1build2, 3.2.7-1ubuntu1, 3.2.7-1ubuntu1.1, 3.2.7-1ubuntu1.2, 3.2.7-1ubuntu1.4, 3.2.7-1ubuntu1.5, 3.4.1+ds1-5ubuntu1, 3.4.1+ds1-6, 3.4.1+ds1-7, 3.4.1+ds1-7ubuntu0.2, 3.4.1+ds1-7ubuntu0.3, 3.4.4+ds1-1, 3.4.4+ds1-1build1, 3.5.0+ds1-2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-53788
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:28 UTC · Revision 1
Source evidence
rsync before 3.5.0 contains a newline injection vulnerability in the name-converter uid/gid mapping interface that allows local attackers to forge protocol messages by creating user or group names containing newline characters. Attackers can inject malicious newline characters into names communicated over the pipe-based line-oriented protocol to cause the rsync daemon to process attacker-influenced data as legitimate protocol input, corrupting uid/gid mapping logic.
osv:UBUNTU-CVE-2026-53788
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
Complete source record
{
"id": "72bb81a516cdd711e6b3ac9144ffea74dc198e2c8b384bd505c07f6c7052adf6",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-53788",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-53788",
"summary": "rsync before 3.5.0 contains a newline injection vulnerability in the name-converter uid/gid mapping interface that allows local attackers to forge protocol messages by creating user or group names containing newline characters. Attackers can inject malicious newline characters into names communicated over the pipe-based line-oriented protocol to cause the rsync daemon to process attacker-influenced data as legitimate protocol input, corrupting uid/gid mapping logic.",
"evidence": "osv:UBUNTU-CVE-2026-53788",
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{
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{
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{
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{
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{
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{
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{
"value": "3.1.2-2.1ubuntu1.5",
"evidence": "/affected/2/versions"
},
{
"value": "3.1.2-2.1ubuntu1.6",
"evidence": "/affected/2/versions"
},
{
"value": "3.1.2-2.1ubuntu1.6+esm1",
"evidence": "/affected/2/versions"
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{
"value": "3.1.2-2.1ubuntu1.6+esm2",
"evidence": "/affected/2/versions"
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{
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{
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{
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{
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"structured": {
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"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
},
{
"type": "CVSS_V4",
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},
{
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},
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],
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},
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{
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}
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}
},
{
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"name": "rsync",
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"ecosystem": "Ubuntu:26.10"
},
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"3.4.1+ds1-7",
"3.4.4+ds1-1",
"3.4.4+ds1-1build1",
"3.5.0+ds1-2"
],
"database_specific": {
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},
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{
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}
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},
{
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{
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}
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],
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"ecosystem": "Ubuntu:26.04:LTS"
},
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"3.4.1+ds1-6",
"3.4.1+ds1-7",
"3.4.1+ds1-7ubuntu0.2",
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],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53788.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rsync",
"binary_version": "3.4.1+ds1-7ubuntu0.3"
}
]
}
}
],
"modified": "2026-10-17T12:58:34.837548985Z",
"provider": "osv",
"upstream": [
"CVE-2026-53788"
],
"references": [
"https://ubuntu.com/security/CVE-2026-53788",
"https://www.cve.org/CVERecord?id=CVE-2026-53788",
"https://download.samba.org/pub/rsync/NEWS#3.5.0"
]
},
"related_cves": [
{
"value": "CVE-2026-53788",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 358813,
"published_at": "2026-08-13T15:19:00+00:00"
}