CVE-2026-53799: rsync before 3.5.0 contains a symlink race condition vulnerability that allows local attackers to cause rsync

Q: How do I fix CVE-2026-53799?

rsync: upgrade to 3.5.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-53799 being exploited?

CVE-2026-53799 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-53799 affect?

CVE-2026-53799 affects rsync. Severity is medium (CVSS 6.3). rsync before 3.5.0 contains a symlink race condition vulnerability that allows local attackers to cause rsync to apply arbitrary ACLs or extended attributes to unintended files by substituting a symlink at a predictable destination path bet

Q: How urgent is CVE-2026-53799?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 6.3UPGRADE

CVE-2026-53799 is a medium-severity flaw (CVSS 6.3) 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 symlink race condition vulnerability that allows local attackers to cause rsync to apply arbitrary ACLs or extended attributes to unintended files by substituting a symlink at a predictable destination path between the file write and the subsequent acl_set_file() or lsetxattr() call. Attackers can exploit this timing window to redirect ACL and xattr application through a crafted symlink to files outside the intended

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 98%)
CISA exploited list	No
Weakness	CWE-59, CWE-367
Published	2026-08-13
Last modified	2026-10-23

Publisher (CNA): VulnCheck · Vendor: samba

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-13 15:19 UTCPublished CVE record published
2026-10-23 18:10 UTCUpdated 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.

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.

Quick answers

How do I fix CVE-2026-53799?

rsync: upgrade to 3.5.0. Exact commands for each OS are on this page.

Is CVE-2026-53799 being exploited?

CVE-2026-53799 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-53799 affect?

CVE-2026-53799 affects rsync. Severity is medium (CVSS 6.3). rsync before 3.5.0 contains a symlink race condition vulnerability that allows local attackers to cause rsync to apply arbitrary ACLs or extended attributes to unintended files by substituting a symlink at a predictable destination path bet

How urgent is CVE-2026-53799?

Priority 23/100. No elevated risk signals yet.

Software pages

Samba vulnerabilities

Related CVEs

CVE-2026-70463 HIGH 8.1 UPGRADE rsync 3.1.0 before 3.5.0 contains an authorization bypass in auth users directive parsing
CVE-2026-53791 CRITICAL 9.1 UPGRADE rsync daemon before 3.5.0 contains an IP address spoofing vulnerability that allows unauthenticated remote att
CVE-2026-70461 HIGH 8.2 UPGRADE rsync 3.2.5 before 3.5.0 contains a heap out-of-bounds write vulnerability that allows remote unauthenticated
CVE-2026-70455 HIGH 7.5 UPGRADE rsync 3.4.2 before 3.5.0 contains a denial of service vulnerability that allows a remote sender to exhaust sys
CVE-2026-53795 HIGH 8.1 UPGRADE rsync before 3.5.0 contains an arbitrary file write vulnerability that allows attackers to write files outside

References

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