CVE-2026-53799

CVE-2026-53799 is a medium-severity vulnerability rated 6.3/10 on the CVSS scale. 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.. EPSS estimates a 0.13% chance of exploitation in the next 30 days.