# CVE-2026-9155: Rapid7 InsightConnect Sed Plugin OS command injection

Source: https://junglewise.ai/threats/cve-2026-9155-rapid7-insightconnect-sed-plugin-os-command-injection  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-25. Updated: 2026-06-25  
License: CC BY 4.0 with a link back

CVE-2026-9155 · Severity: high · CVSS 8.8 · Published 2026-06-25

A security vulnerability exists in the Rapid7 InsightConnect Sed plugin, a tool used for automated text manipulation within security workflows. An authorized user can exploit this flaw to run unauthorized commands on the underlying Linux server. This could lead to a complete system takeover, data theft, or disruption of automated security operations.

Technologies: [Rapid7 InsightConnect Sed Plugin](https://junglewise.ai/threats/technologies/insightconnect-sed-plugin). Vendors: [Rapid7](https://junglewise.ai/threats/vendors/rapid7).

## Quick answers

**Is CVE-2026-9155 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-9155 being exploited in the wild.

**How severe is CVE-2026-9155?** High severity, with a CVSS score of 8.8, published 25 June 2026.

**Which products and versions are affected?** Rapid7 InsightConnect Sed Plugin < 2.0.5.

**Is there a fix for CVE-2026-9155?** 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-2026-9155 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-9155?** Check whether you run Rapid7 InsightConnect Sed 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 Rapid7 InsightConnect Sed Plugin for Linux. The flaw is located in the handling of the 'expression' parameter, which lacks sufficient input validation before being passed to a system shell. An authenticated attacker with network access to the plugin can inject malicious shell commands to be executed with the privileges of the plugin process. This can result in full system compromise, unauthorized data access, and lateral movement. The issue is resolved in version 2.0.5.

## Affected products

- Rapid7 InsightConnect Sed Plugin < 2.0.5

## Timeline

- 2026-06-25: disclosed
- 2026-06-25: advisory

## References

- [https://extensions.rapid7.com/extension/sed](https://extensions.rapid7.com/extension/sed)

## Related threats

- [Rapid7 InsightConnect Sed Plugin arbitrary file write in expression parameter](https://junglewise.ai/threats/cve-2026-9154-rapid7-insightconnect-sed-plugin-arbitrary-file-write-in)
- [Rapid7 InsightConnect Sed Plugin arbitrary file read via expression parameter](https://junglewise.ai/threats/cve-2026-9153-rapid7-insightconnect-sed-plugin-arbitrary-file-read-via)