PatchTheCVECVE-2026-53786: rsync before 3.5.0 contains a filter rule bypass vulnerability that allows authenticated clients to override m
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Routine
MEDIUM 6.5REMOTEUPGRADE
CVE-2026-53786 is a medium-severity flaw (CVSS 6.5) affecting rsync. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 67%) |
| CISA exploited list | No |
| Weakness | CWE-863 |
| Published | 2026-08-13 |
| Last modified | 2026-10-23 |
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
samba rsync UPGRADE
Affected: < 3.5.0
Fixed in: 3.5.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy rsync || rpm -q rsync || rsync --version
2. UPGRADE to 3.5.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade rsync
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade rsync
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
Exact fixes by distribution
Fedora 46 · wasmedge · FIXED · 0.18.1-1.fc46 · FEDORA-2026-4c27216e39 · source
sudo dnf upgrade --advisory=FEDORA-2026-4c27216e39
Debian 12 · rsync · NO FIX YET
Debian 13 · rsync · FIXED · 3.5.0+ds1-0+deb13u1
sudo apt update && sudo apt install --only-upgrade rsync
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' rsync)" ge "3.5.0+ds1-0+deb13u1" && echo PATCHED || echo STILL-VULNERABLE
RHEL 10 · rsync · DEFERRED
RHEL 6 · rsync · DEFERRED
RHEL 7 · rsync · DEFERRED
RHEL 8 · rsync · DEFERRED
RHEL 9 · rsync · DEFERRED
Alpine 3.21 · rsync · FIXED · rsync-3.5.0-r0
apk add --upgrade rsync
apk info -v rsync
Alpine 3.22 · rsync · FIXED · rsync-3.5.0-r0
apk add --upgrade rsync
apk info -v rsync
Alpine 3.23 · rsync · FIXED · rsync-3.5.0-r0
apk add --upgrade rsync
apk info -v rsync
Alpine 3.24 · rsync · FIXED · rsync-3.5.0-r0
apk add --upgrade rsync
apk info -v rsync
sudo dnf update --advisory=ALAS2023-2026-3131
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
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