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rsync EUVDEUVD-2026-58092

| CVE-2026-53785 MEDIUM
Improper Link Resolution Before File Access (CWE-59)
2026-08-13 VulnCheck
6.9
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
6.9 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/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
7.1 HIGH

Attacker must control the sender (PR:L, AV:L); --relative mode traversal yields arbitrary writes (I:H) and potential file destruction or corruption (A:H); no confidentiality impact.

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Red Hat
7.1 HIGH
qualitative

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Source Code Evidence Fetched
Aug 13, 2026 - 16:08 vuln.today
Analysis Generated
Aug 13, 2026 - 16:08 vuln.today
CVE Published
Aug 13, 2026 - 14:34 cve.org
MEDIUM 6.9

DescriptionCVE.org

rsync before 3.5.0 contains a path traversal vulnerability that allows a malicious sender to write files outside the intended destination directory tree by crafting relative paths with symlink components in --relative mode. The make_path() function follows symlinks pointing outside the destination tree while creating intermediate directories without verifying that created paths remain within the destination boundary, enabling arbitrary file writes on the receiver's filesystem.

AnalysisAI

Path traversal in rsync before 3.5.0 allows a malicious sender to write arbitrary files outside the receiver's intended destination directory by exploiting symlink following in --relative mode. The make_path() function creates intermediate directories while following symlinks without enforcing that resolved paths stay within the destination tree boundary, enabling controlled file writes to arbitrary locations on the receiver's filesystem. No public exploit or CISA KEV listing is confirmed at time of analysis, but the CVSS 4.0 score of 6.9 with high integrity and availability impact reflects meaningful real-world risk given rsync's ubiquity in backup and synchronization workflows.

Technical ContextAI

rsync (CPE: cpe:2.3:a:rsyncproject:rsync:*:*:*:*:*:*:*:*) is a widely deployed file synchronization utility. The --relative mode preserves path components as sent by the sender during transfer. The root cause maps to CWE-59 (Improper Link Resolution Before File Access / Link Following): the internal make_path() function iterates through path components to create intermediate directories but resolves symbolic links transparently without checking whether the resolved path escapes the configured destination root. A sender controlling path data can embed a symlink component pointing outside the destination tree; make_path() will follow it and create (or write into) directories beyond the intended boundary. This is a classic TOCTOU-adjacent link-following flaw - the path validation and the actual filesystem operation diverge due to symlink indirection.

RemediationAI

Upgrade to rsync 3.5.0 or later, which is confirmed as the vendor-released patch per the GitHub release at https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 and the upstream NEWS file at https://download.samba.org/pub/rsync/NEWS#3.5.0. For environments that cannot immediately upgrade, avoid using --relative mode when syncing from untrusted or semi-trusted senders - disabling this flag removes the exploitable code path entirely but may break workflows that depend on preserving relative path structure. Where --relative mode is operationally required, restrict rsync to trusted senders only via rrsync, SSH forced commands, or allowlist-based access controls on the receiving host; note that this is a compensating control, not a fix. Additionally, running the rsync receiver as a low-privilege user with chroot isolation to the destination directory can limit the blast radius of a successful exploit even if the path escape occurs.

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Vendor StatusVendor

SUSE

Severity: Important
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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EUVD-2026-58092 vulnerability details – vuln.today

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