Vulnerability Description
rsync before 3.5.0 contains a symlink race condition vulnerability that allows local attackers to cause rsync to apply arbitrary ACLs or extended attributes to unintended files by substituting a symlink at a predictable destination path between the file write and the subsequent acl_set_file() or lsetxattr() call. Attackers can exploit this timing window to redirect ACL and xattr application through a crafted symlink to files outside the intended destination tree, potentially granting elevated permissions and enabling local privilege escalation.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Samba | Rsync | < 3.5.0 |
Related Weaknesses (CWE)
References
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0ProductRelease Notes
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-phxh-hjqv-39c9Vendor Advisory
- https://www.vulncheck.com/advisories/rsync-symlink-race-condition-via-acl-xattr-Release NotesThird Party Advisory
FAQ
What is CVE-2026-53799?
CVE-2026-53799 is a vulnerability with a CVSS score of 6.3 (MEDIUM). rsync before 3.5.0 contains a symlink race condition vulnerability that allows local attackers to cause rsync to apply arbitrary ACLs or extended attributes to unintended files by substituting a symli...
How severe is CVE-2026-53799?
CVE-2026-53799 has been rated MEDIUM with a CVSS base score of 6.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53799?
Check the references section above for vendor advisories and patch information. Affected products include: Samba Rsync.