Vulnerability in Rsyncproject Rsync
CVE-2026-53791
rsync daemon before 3.5.0 contains an IP address spoofing vulnerability that allows unauthenticated remote attackers to bypass IP-based access controls by sending a crafted PROXY protocol header with a forged source address. Attackers who…
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Rsyncproject Rsync — versions 0, 3.5.0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (release-notes)
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-53791?
- CVE-2026-53791 is a critical-severity vulnerability in Rsyncproject Rsync, classified under Authentication Bypass by Spoofing. CVSS score: 9.1/10. Published 2026-08-13.
- How severe is CVE-2026-53791?
- Critical severity. CVSS v3 base score is 9.1 out of 10.