Quick answers
- Is CVE-2026-8666 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-8666 being exploited in the wild.
- How severe is CVE-2026-8666?
- High severity, with a CVSS score of 7.7, published 25 June 2026.
- Which products and versions are affected?
- Rapid7 InsightConnect Traceroute Plugin < 1.0.3.
- Is there a fix for CVE-2026-8666?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-8666 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-8666?
- Check whether you run Rapid7 InsightConnect Traceroute Plugin at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An OS Command Injection vulnerability (CWE-78) exists in the 'traceroute' action of the Rapid7 InsightConnect Traceroute Plugin for Linux. The flaw is caused by insufficient input validation of several request parameters, including host, port, max_ttl, count, and time_out, which are used to construct shell commands. A remote attacker can exploit this by submitting specially crafted values for these parameters to execute arbitrary commands on the host system. The vulnerability is mitigated by a high attack complexity (AC:H) but requires no prior authentication. Users should update to version 1.0.3 or later to remediate the issue.
Affected products
- Rapid7 InsightConnect Traceroute Plugin < 1.0.3
Timeline
- 2026-06-25: disclosed
- 2026-06-25: advisory