CVE-2026-43619 Rsync < 3.4.3 Symlink Race Condition via Path-Based Syscalls

What is CVE-2026-43619?

CVE-2026-43619 is a high-severity vulnerability in RsyncProject rsync, published on 20 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module. Attackers with local filesystem access can exploit the timing window between path resolution and syscall execution by swapping symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files outside the intended module boundary on rsync daemons configured with 'use chroot = no'.

Weakness: CWE-59, CWE-367

Which versions are affected by CVE-2026-43619?

It affects 1 product.

Products include Samba Rsync.

How do I fix CVE-2026-43619?

Upgrade to a fixed version.

Is CVE-2026-43619 being exploited?

There is no known exploitation of CVE-2026-43619 in the wild and no public exploit code.

Other vulnerabilities in RsyncProject rsync

• CVE-2017-15994 Security feature bypass in n/a Critical 9.8
• CVE-2026-53791 rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header Critical 9.1
• CVE-2026-70461 rsync 3.2.5 < 3.5.0 Heap Out-of-Bounds Write via files-from Entry High 8.8
• CVE-2026-70455 rsync 3.4.2 < 3.5.0 DoS via --zt Zstandard Compression Thread Exhaustion High 8.7
• CVE-2026-70463 rsync 3.1.0 < 3.5.0 Authorization Bypass via auth users Directive Parsing High 8.6

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2026-43619, AZL-86985, BELL-CVE-2026-43619, CLSA-2026-1779959867, CLSA-2026-1780486587, CVE-2026-44509 and 6 more.