# CVE-2026-9154: Rapid7 InsightConnect Sed Plugin arbitrary file write in expression parameter

Source: https://junglewise.ai/threats/cve-2026-9154-rapid7-insightconnect-sed-plugin-arbitrary-file-write-in  
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-2026-9154 · Severity: high · CVSS 7.1 · Published 2026-06-25

A security vulnerability in the Rapid7 InsightConnect Sed Plugin for Linux allows authorized users to write data to any file on the underlying system. InsightConnect is an automation platform used for security operations, and this flaw could allow a user to corrupt system files or modify critical configurations. This could lead to service disruptions or unauthorized changes to the security environment.

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-2026-9154 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-9154 being exploited in the wild.

**How severe is CVE-2026-9154?** High severity, with a CVSS score of 7.1, published 25 June 2026.

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

**Is there a fix for CVE-2026-9154?** 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-2026-9154 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-9154?** 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 arbitrary file write vulnerability exists in the Rapid7 InsightConnect Sed Plugin on Linux due to improper limitation of a pathname to a restricted directory (CWE-22). Authenticated attackers can exploit this by providing a specially crafted string to the 'expression' parameter, allowing them to write attacker-controlled content to arbitrary file paths on the host system. The vulnerability is reachable over the network with low privileges and requires no user interaction. A fix is available in version 2.0.5 of the plugin.

## 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 OS command injection](https://junglewise.ai/threats/cve-2026-9155-rapid7-insightconnect-sed-plugin-os-command-injection)
- [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)