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CVE

CVE-2026-53791

rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header
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CVE

CVE-2026-53791

rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.1
-
4.0
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/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
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53791.json, https://github.com/RsyncProject/rsync/releases/tag/v3.5.0, https://github.com/RsyncProject/rsync/security/advisories/GHSA-h2q9-5fr8-w635, https://nvd.nist.gov/vuln/detail/CVE-2026-53791, https://www.vulncheck.com/advisories/rsync-daemon-ip-spoofing-via-proxy-protocol-header, https://github.com/RsyncProject/rsync

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00471%
EPSS Percentile
0.38789%
Introduced Version
0
Fix Available
471e17dc0d68233db84db11be82c9f62f4661214

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