High 8.1Published Aug 13, 2026

CVE-2026-53783rsync < 3.5.0 TOCTOU Race Condition Directory Escape via rrsync

Updated under an hour ago (2026-10-19 06:10 UTC)

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It affects RsyncProject rsync. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for RsyncProject rsync

Exploited in the last 30 days

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.

CVSS: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-59, CWE-88
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Aug 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

RsyncProject rsync rsyncproject:rsync (from the name)	through 3.4.4; 3.5.0 not affected	CNA record

References

https://github.com/RsyncProject/rsync/security/advisories/GHSA-9cgc-64g4-3gv5vendor-advisory
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0release-notes
https://www.vulncheck.com/advisories/rsync-toctou-race-condition-directory-escape-via-rrsyncthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.