{"id":"CVE-2026-53799","aliases":["GHSA-phxh-hjqv-39c9"],"url":"https://o3.security/vulnerability/CVE-2026-53799","summary":"rsync < 3.5.0 Symlink Race Condition via ACL/xattr Application","details":"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.","published":"2026-08-13T14:40:45.664Z","modified":"2026-08-15T04:07:26.349332053Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53799.json"},{"type":"PACKAGE","url":"https://github.com/RsyncProject/rsync"},{"type":"ADVISORY","url":"https://github.com/RsyncProject/rsync/releases/tag/v3.5.0"},{"type":"ADVISORY","url":"https://github.com/RsyncProject/rsync/security/advisories/GHSA-phxh-hjqv-39c9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53799"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/rsync-symlink-race-condition-via-acl-xattr-application"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-15T04:07:26.349332053Z"}}