CVE-2026-53791
9.1
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Summary
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 can connect directly to the rsync daemon can inject a spoofed source IP in the PROXY protocol header to circumvent hosts allow/deny rules, gaining unauthorized access that would otherwise be blocked based on their real source address.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| RsyncProject | rsync | 0 <= 3.4.4 | affected |
| RsyncProject | rsync | 3.5.0 | unaffected |
Weaknesses
- CWE-290: CWE-290 Authentication Bypass by Spoofing
References
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-h2q9-5fr8-w635
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
- https://www.vulncheck.com/advisories/rsync-daemon-ip-spoofing-via-proxy-protocol-header
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