CVE-2026-5329: Rapid7 Velociraptor versions prior to 0.76.2 contain an improper input validation vulnerability in the client

This month

HIGH 8.5UPGRADE

CVE-2026-5329 is a high-severity flaw (CVSS 8.5) affecting velociraptor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Rapid7 Velociraptor versions prior to 0.76.2 contain an improper input validation vulnerability in the client monitoring message handler on the Velociraptor server (primarily Linux) that allows an authenticated remote attacker to write to arbitrary internal server queues via a crafted monitoring message with a malicious queue name. The server handler that receives client monitoring messages does not sufficiently validate the queue name supplied

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-20
Published	2026-04-09
Last modified	2026-10-26

Publisher (CNA): Rapid7, Inc. · Vendor: rapid7

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-09 18:17 UTCPublished CVE record published
2026-10-26 00:10 UTCUpdated Record last modified

rapid7 velociraptor UPGRADE

Affected: <= 0.75.6 · >= 0.76 and < 0.76.3

Fixed in: 0.76.3

Safe to downgrade to: a release before 0.76

1. Check installed version

apt-cache policy velociraptor || rpm -q velociraptor || velociraptor --version

2. UPGRADE to 0.76.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade velociraptor

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade velociraptor

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.76 (Debian / Ubuntu)

apt-cache madison velociraptor sudo apt install velociraptor=<VERSION_BEFORE_0.76> sudo apt-mark hold velociraptor

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list velociraptor sudo dnf downgrade velociraptor-<VERSION_BEFORE_0.76> sudo dnf versionlock add velociraptor

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-5329?

velociraptor: upgrade to 0.76.3. Exact commands for each OS are on this page.

Is CVE-2026-5329 being exploited?

CVE-2026-5329 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-2026-5329 affect?

CVE-2026-5329 affects velociraptor. Severity is high (CVSS 8.5). Rapid7 Velociraptor versions prior to 0.76.2 contain an improper input validation vulnerability in the client monitoring message handler on the Velociraptor server (primarily Linux) that allows an authenticated remote attacker to write to

How urgent is CVE-2026-5329?

Priority 40/100. High severity

References

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