CVE-2026-8666: OS Command Injection in Rapid7 InsightConnect Traceroute Plugin

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-25 · updated 2026-10-25
Weakness: CWE-78

Description

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.

Affected products

Rapid7 InsightConnect Traceroute Plugin: before 1.0.3 — fixed in 1.0.3

How to fix

Upgrade to a fixed version: Rapid7 InsightConnect Traceroute Plugin 1.0.3. Check the vendor advisory for mitigations.

References

https://extensions.rapid7.com/extension/traceroute

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