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rsync CVE-2026-53795

| EUVDEUVD-2026-58034 HIGH
Improper Link Resolution Before File Access (CWE-59)
2026-08-13 VulnCheck
Authentication Bypass Rsync Suse
7.2
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
7.2 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/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
vuln.today AI
8.1 HIGH

Network-reachable with user interaction required to trigger the write; no privileges needed; write-only primitive yields no confidentiality impact but high integrity and availability loss.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
6.8 MEDIUM
AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

3
Source Code Evidence Fetched
Aug 13, 2026 - 15:53 vuln.today
Analysis Generated
Aug 13, 2026 - 15:53 vuln.today
CVE Published
Aug 13, 2026 - 14:39 cve.org
HIGH 7.2

DescriptionCVE.org

rsync before 3.5.0 contains an arbitrary file write vulnerability that allows attackers to write files outside the intended destination tree by specifying an absolute path via --temp-dir or --link-dest options. The rename-confinement logic is bypassed when these options resolve to paths outside the destination tree, enabling attacker-controlled values to write files to arbitrary locations accessible to the rsync process.

AnalysisAI

Arbitrary file write in rsync before 3.5.0 allows attackers who control --temp-dir or --link-dest option values to escape the intended destination tree by supplying absolute paths, bypassing the rename-confinement security boundary. Any filesystem location writable by the rsync process can be targeted, enabling overwrite of system files, configuration, or planted malicious content. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify rsync invocation accepting external option values
Delivery
Supply absolute out-of-tree path to --temp-dir or --link-dest
Exploit
Trigger rsync transfer operation (user interaction)
Execution
Rename-confinement check bypassed for out-of-tree path
Persist
Write attacker-controlled file content to arbitrary writable location
Impact
Overwrite high-value target (cron, keys, config) for persistence or escalation
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Vulnerability AssessmentAI

Exploitation Exploitation requires that an attacker can control or inject the value supplied to --temp-dir or --link-dest, specifically an absolute path resolving outside the destination directory. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:P/VI:H/VA:H) indicates network-reachable exploitation with low complexity and no special attack requirements, constrained only by a user-interaction prerequisite (UI:P) - meaning some participation or triggering action is required for the exploit path to complete. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who can influence the arguments passed to an rsync invocation - for example, through a misconfigured backup script that interpolates user-supplied paths, a server-side rsync daemon accepting client-controlled options, or a malicious rsync server pairing with an unpatched client - supplies an absolute path such as /etc or /root to --temp-dir or --link-dest. The rename-confinement check fails to flag the out-of-tree path, and rsync writes attacker-controlled file content directly to that location. …
Remediation Upgrade to rsync 3.5.0 or later, the confirmed major security release that resolves this flaw (release page: https://github.com/RsyncProject/rsync/releases/tag/v3.5.0; full changelog vs. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, conduct inventory of all systems running rsync versions prior to 3.5.0 and identify which instances allow external users or automated systems to influence --temp-dir or --link-dest parameters. …

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Affected
SUSE Linux Enterprise Micro 5.3 Affected

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CVE-2026-53795 vulnerability details – vuln.today
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