ALPINE-CVE-2026-53803
rsync before 3.5.0 contains a symlink following vulnerability that allows local attackers to overwrite arbitrary files by placing a symlink at a predictable output path such as --log-file, --write-batch, or daemon-mode log and statistics paths. Attackers can exploit rsync's failure to reject symlinks during ancillary file writes to redirect output to arbitrary filesystem locations, achieving local privilege escalation on installations where rsync runs with elevated privileges such as setuid or privileged daemon configurations.
ALPINE-CVE-2026-53803
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:ALPINE-CVE-2026-53803
rsync
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 3.5.0-r0
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
rsync
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 3.5.0-r0
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
rsync
Source reference: /affected/2/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 3.5.0-r0
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
rsync
Source reference: /affected/3/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 3.5.0-r0
Source reference:
/affected/3/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.0-r0"
}
]
}
],
"package": {
"name": "rsync",
"purl": "pkg:apk/alpine/rsync?arch=source",
"ecosystem": "Alpine:v3.21"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-53803.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.0-r0"
}
]
}
],
"package": {
"name": "rsync",
"purl": "pkg:apk/alpine/rsync?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-53803.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.0-r0"
}
]
}
],
"package": {
"name": "rsync",
"purl": "pkg:apk/alpine/rsync?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-53803.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.0-r0"
}
]
}
],
"package": {
"name": "rsync",
"purl": "pkg:apk/alpine/rsync?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-53803.json"
},
"ecosystem_specific": {}
}
]Publisher severity
No explicit severity was provided.
- Event
- #54525 · Revision 1
- Added to Heist Feed
- Publisher date