CVE-2026-53783
published 2026-08-13CVE-2026-53783: rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows…
PriorityP349high8.1CVSS 3.1
AVNACLPRLUINSUCHIHAN
EPSS
0.37%
30.6th percentile
rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink for a path component after validation but before transfer processing. Attackers can additionally leverage unrestricted flags such as --copy-unsafe-links, -D, and --log-file through rrsync to read or write files outside the permitted directory subtree.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| rsyncproject | rsync | <= 3.4.4 | — |
| samba | rsync | — | — |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
nvdv4.08.6HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat8.1HIGH
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Bugzilla
CVE-2026-53783 rsync: rsync: Directory escape via TOCTOU race condition in rrsync [fedora-all]
bugzilla·2026-08-20·CVSS 8.1
CVE-2026-53783 [HIGH] CVE-2026-53783 rsync: rsync: Directory escape via TOCTOU race condition in rrsync [fedora-all]
CVE-2026-53783 rsync: rsync: Directory escape via TOCTOU race condition in rrsync [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink for a path component after validation but before transfer processing. Attackers can additionally leverage unrestricted flags such as --copy-unsafe-links, -D, and --log-file through rrsync to read or write files outside the permitted director
Bugzilla
CVE-2026-53783 rsync: rsync: Directory escape via TOCTOU race condition in rrsync
bugzilla·2026-08-13·CVSS 8.1
CVE-2026-53783 [HIGH] CVE-2026-53783 rsync: rsync: Directory escape via TOCTOU race condition in rrsync
CVE-2026-53783 rsync: rsync: Directory escape via TOCTOU race condition in rrsync
rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink for a path component after validation but before transfer processing. Attackers can additionally leverage unrestricted flags such as --copy-unsafe-links, -D, and --log-file through rrsync to read or write files outside the permitted directory subtree.
2026-08-13
Published