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VULNERABILITIES

CVE-2026-53803 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 [email protected]ProductRelease Notes
https://github.com/RsyncProject/rsync/security/advisories/GHSA-g9f4-7q66-9582 [email protected]Vendor Advisory
https://www.vulncheck.com/advisories/rsync-symlink-following-arbitrary-file-overwrite [email protected]Release NotesThird Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-59Improper Link Resolution Before File Access ('Link Following')[email protected]

Affected Products

ProductVersions
samba rsync
< 3.5.0

CPE

  • cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-53803
NVD Published Date:
Aug 13, 2026
NVD Last Modified:
Aug 31, 2026
Source:
[email protected]
CVE-2026-53803 Details - Not Deferred