CVE-2026-8666: OS Command Injection vulnerability in the traceroute action of Rapid7 InsightConnect Traceroute Plugin on Linu

Q: How do I fix CVE-2026-8666?

insightconnect traceroute: upgrade to 1.0.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-8666 being exploited?

CVE-2026-8666 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-2026-8666 affect?

CVE-2026-8666 affects insightconnect traceroute. Severity is high (CVSS 7.7). OS Command Injection vulnerability in the traceroute action of Rapid7 InsightConnect Traceroute Plugin on Linux allows remote attackers to execute arbitrary OS commands via the host, port, max_ttl, count, or time_out request parameters due

Q: How urgent is CVE-2026-8666?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.7REMOTEUPGRADE

CVE-2026-8666 is a high-severity flaw (CVSS 7.7) affecting insightconnect traceroute. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OS Command Injection vulnerability in the traceroute action of Rapid7 InsightConnect Traceroute Plugin on Linux allows remote attackers to execute arbitrary OS commands via the host, port, max_ttl, count, or time_out request parameters due to insufficient input validation when constructing shell commands.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.7 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-06-25
Last modified	2026-10-25

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

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-25 02:16 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

rapid7 insightconnect traceroute UPGRADE

Affected: < 1.0.3

Fixed in: 1.0.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy insightconnect-traceroute || rpm -q insightconnect-traceroute || insightconnect-traceroute --version

2. UPGRADE to 1.0.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade insightconnect-traceroute

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade insightconnect-traceroute

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-2026-8666?

insightconnect traceroute: upgrade to 1.0.3. Exact commands for each OS are on this page.

Is CVE-2026-8666 being exploited?

CVE-2026-8666 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-2026-8666 affect?

CVE-2026-8666 affects insightconnect traceroute. Severity is high (CVSS 7.7). OS Command Injection vulnerability in the traceroute action of Rapid7 InsightConnect Traceroute Plugin on Linux allows remote attackers to execute arbitrary OS commands via the host, port, max_ttl, count, or time_out request parameters due

How urgent is CVE-2026-8666?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

References

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