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NVD / CVE Program· CNA VulnCheck

CVE-2026-53784: rsync < 3.5.0 Path Traversal via Symlink Module Root

Noroxi assessment

Priority: Monitor (action score 33/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.23% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: rsync (AlmaLinux:10) 3.5.0-3.el10_2; rsync-daemon (AlmaLinux:10) 3.5.0-3.el10_2; rsync-rrsync (AlmaLinux:10) 3.5.0-3.el10_2.

Low priority for now. Upgrade to rsync (AlmaLinux:10) 3.5.0-3.el10_2; rsync-daemon (AlmaLinux:10) 3.5.0-3.el10_2; rsync-rrsync (AlmaLinux:10) 3.5.0-3.el10_2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

rsync before 3.5.0 contains a path traversal vulnerability that allows remote clients to access files outside the intended module root when use chroot is disabled and the module root path or a component of it is a symlink. The daemon calls chdir() to the module root at session initialization without resolving symlinks via realpath() or equivalent, causing subsequent relative-path operations to reference files relative to the symlink target rather than the intended module root, enabling unauthorized file access.

HighCVSS 8.4 · v4.0—No exploit Fix available
Published
Aug 13, 2026
Updated
Oct 24, 2026
EPSS
0.2% · 14th percentile

Report tools

JSON

Action score

33

Monitor

Low priority for now.

CVSS
33 / 40 · 8.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
8.4
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-53784

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
sambarsync

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • samba rsyncbefore 3.5.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • RsyncProject rsync

    • 3.5.0not affected
    • up to and including 3.4.4affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10rsyncbefore 3.5.0-3.el10_23.5.0-3.el10_2
AlmaLinux:10rsync-daemonbefore 3.5.0-3.el10_23.5.0-3.el10_2
AlmaLinux:10rsync-rrsyncbefore 3.5.0-3.el10_23.5.0-3.el10_2
AlmaLinux:8rsyncbefore 3.1.3-28.el8_103.1.3-28.el8_10
AlmaLinux:8rsync-daemonbefore 3.1.3-28.el8_103.1.3-28.el8_10
AlmaLinux:9rsyncbefore 3.2.7-1.el9_83.2.7-1.el9_8
AlmaLinux:9rsync-daemonbefore 3.2.7-1.el9_83.2.7-1.el9_8
AlmaLinux:9rsync-rrsyncbefore 3.2.7-1.el9_83.2.7-1.el9_8
Alpine:v3.21rsyncbefore 3.5.0-r03.5.0-r0
Debian:12rsyncfrom 0—
Debian:13rsyncbefore 3.5.0+ds1-0+deb13u13.5.0+ds1-0+deb13u1
Debian:14rsyncbefore 3.5.0+ds1-13.5.0+ds1-1
openSUSE:Leap 16.0rsyncbefore 3.4.1-160000.6.13.4.1-160000.6.1
openSUSE:Tumbleweedrsyncbefore 3.5.1-1.13.5.1-1.1
Red Hat:enterprise_linux:10.2rsyncbefore 0:3.5.0-3.el10_20:3.5.0-3.el10_2
Red Hat:enterprise_linux:10.2rsync-daemonbefore 0:3.5.0-3.el10_20:3.5.0-3.el10_2
Red Hat:enterprise_linux:10.2rsync-debuginfobefore 0:3.5.0-3.el10_20:3.5.0-3.el10_2
Red Hat:enterprise_linux:10.2rsync-debugsourcebefore 0:3.5.0-3.el10_20:3.5.0-3.el10_2
Red Hat:enterprise_linux:10.2rsync-rrsyncbefore 0:3.5.0-3.el10_20:3.5.0-3.el10_2
Red Hat:enterprise_linux:8::baseosrsyncbefore 0:3.1.3-28.el8_100:3.1.3-28.el8_10
Red Hat:enterprise_linux:8::baseosrsync-daemonbefore 0:3.1.3-28.el8_100:3.1.3-28.el8_10
Red Hat:enterprise_linux:8::baseosrsync-debuginfobefore 0:3.1.3-28.el8_100:3.1.3-28.el8_10
Red Hat:enterprise_linux:8::baseosrsync-debugsourcebefore 0:3.1.3-28.el8_100:3.1.3-28.el8_10
Red Hat:enterprise_linux:9::appstreamrsync-daemonbefore 0:3.2.7-1.el9_80:3.2.7-1.el9_8

+12

Same product

samba: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-12084Rsync: heap buffer overflow in rsync due to improper checksum length handling
    61This week
  • CVE-2017-16548The receive_xattr function in xattrs.c in rsync 3.1.2 and 3.1.3-development does not check for a trailing '\0' character in an xattr name, w
    41Plan
  • CVE-2017-17434The daemon in rsync 3.1.2, and 3.1.3-development before 2017-12-03, does not check for fnamecmp filenames in the daemon_filter_list data str
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-45232May 19, 2026 · Rsync < 3.4.3 Off-by-One Stack Write via HTTP Proxy
    8Monitor
  • ← EarlierCVE-2026-29518May 20, 2026 · Rsync < 3.4.3 TOCTOU Race Condition Allows Symlink-Based Arbitrary File Write
    29Monitor
  • Later →CVE-2026-53786Aug 13, 2026 · rsync < 3.5.0 Filter Rule Bypass via --filter Merge Directive
    27Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:rsync3.2.7-1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:rsync-daemon3.2.7-1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:rsync-rrsync3.2.7-1.el9_8 · AlmaLinux:9Package registry (OSV)
alpine:rsync3.5.0-r0 · Alpine:v3.21Package registry (OSV)
debian:rsync3.5.0+ds1-0+deb13u1 · Debian:13Package registry (OSV)
opensuse:rsync3.5.1-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:rsync0:3.2.7-1.el9_8 · Red Hat:enterprise_linux:9::baseosPackage registry (OSV)
red hat:rsync-daemon0:3.2.7-1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:rsync-debuginfo0:3.2.7-1.el9_8 · Red Hat:enterprise_linux:9::baseosPackage registry (OSV)
red hat:rsync-debugsource0:3.2.7-1.el9_8 · Red Hat:enterprise_linux:9::baseosPackage registry (OSV)
red hat:rsync-rrsync0:3.2.7-1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
rocky linux:rsync0:3.2.7-1.el9_8 · Rocky Linux:9Package registry (OSV)
suse:rsync3.2.7-8.1 · SUSE:Linux Micro 6.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-538030 days apartrsync < 3.5.0 Symlink Following Arbitrary File Overwrite
    34Monitor
  • CVE-2026-538010 days apartrsync < 3.5.0 Symlink Race Condition Directory Traversal
    32Monitor
  • CVE-2026-537950 days apartrsync < 3.5.0 Arbitrary File Write via --temp-dir/--link-dest
    28Monitor
  • CVE-2026-537990 days apartrsync < 3.5.0 Symlink Race Condition via ACL/xattr Application
    28Monitor
  • CVE-2026-4361986 days apartRsync < 3.4.3 Symlink Race Condition via Path-Based Syscalls
    28Monitor
  • CVE-2026-537970 days apartrsync < 3.5.0 Symlink Race Condition Information Disclosure
    22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2026-537910 days apartrsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header
    36Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
X

Weakness class (CWE)

CWE-59 · Improper Link Resolution Before File Access ('Link Following')

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records