Vulnerability in Rsyncproject Rsync
CVE-2026-43619
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'.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.001 (2.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: -0.000
Affected products
- Rsyncproject Rsync — versions 0
- Samba Rsync
Weakness classification (CWE)
References
- github.com/RsyncProject/rsync/security/advisories/GHSA-4h9m-w5ff-j735 (vendor-advisory, Vendor Advisory)
- github.com/RsyncProject/rsync/releases/tag/v3.4.3 (release-notes, Release Notes)
- www.vulncheck.com/advisories/rsync-symlink-race-condition-via-path-based-syscal… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-43619?
- CVE-2026-43619 is a medium-severity vulnerability in Rsyncproject Rsync, classified under Improper Link Resolution Before File Access. CVSS score: 6.3/10. Published 2026-05-20.
- How severe is CVE-2026-43619?
- Medium severity. CVSS v3 base score is 6.3 out of 10.