Name: CVE-2026-53786: Incorrect Authorization
Creator: Rapid7
Published: 2026-08-13T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-53786, CWE-863, CVSS 6.5, EPSS 0.00398

rsync before 3.5.0 contains a filter rule bypass vulnerability that allows authenticated clients to override module-level filter restrictions by supplying malicious --filter merge file directives. Attackers can inject client-side merge file directives during filter evaluation to introduce rules that supersede daemon module-level restrictions, gaining access to files the module filter was intended to exclude.

CVSS Details

CVSS 4.0 Base Score: 6.9 (MEDIUM)
CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/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)
CVSS 3.1 Base Score: 6.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alpine Linux	—	Upgrade rsync	Sep 1, 2026	Aug 13, 2026
Amazon_linux_2023	—	Upgrade rsync-debugsourceUpgrade rsyncUpgrade rsync-daemonUpgrade rsync-debuginfo	Sep 30, 2026	Aug 13, 2026
Debian	—	Upgrade rsync	Sep 30, 2026	Aug 13, 2026
Freebsd	—	Upgrade rsync	Aug 27, 2026	Aug 25, 2026
Redhat_linux	—	No solution exists	Sep 9, 2026	Aug 13, 2026
Vmware Photon_os	—	Use 'tdnf update' to upgrade all packages to the latest version.	Sep 15, 2026	Aug 13, 2026

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CVSS Details

Covered by Rapid7

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