CVE-2026-53793: rsync 0 through 3.4.4

CVE-2026-53793. CVSS 3.1 base score 7.4 (HIGH, Vendor/CNA). EPSS 0.00393 (percentile 0.32306), scored 22-Oct-2026.

Affected technology

rsync · 0 through 3.4.4
RsyncProject

Description’s affected range: before 3.5.0

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Attackers can exploit improper handling of the /./ notation or forge delta-basis transfers referencing xname paths that cross the /./ boundary to gain unauthorized read or write access to files outside the module's subtree. Vendor/CNA’s CVSS 4.0 assessment (base score 9.1/10) rates confidentiality and integrity impact as high; availability impact as none.

Published 24-Oct-2026 01:44 UTC

CWE: CWE-59
CCR priority: 29.7 /100 (P4)
CVSS 3.1: 7.4 /10 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N · Vendor/CNA
EPSS: 0.00393 · percentile 0.32306 · 2026-10-22
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-24 01:40:49.068977+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-53793.html