CVE-2026-9155

Description

OS Command Injection vulnerability in Rapid7 InsightConnect Sed Plugin on Linux allows authenticated attackers to execute arbitrary OS commands via the expression parameter due to insufficient input validation.

CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0092

Probability of exploitation

0.56%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-78 OS Command Injection

Affected Products

Vendor	Product	Versions
gnu	sed	All
linux	linux_kernel	All

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2026-9155? +

OS Command Injection vulnerability in Rapid7 InsightConnect Sed Plugin on Linux allows authenticated attackers to execute arbitrary OS commands via the expression parameter due to insufficient input validation. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-9155? +

CVE-2026-9155 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0092, placing it in the 1th percentile for exploitation probability.

What products are affected by CVE-2026-9155? +

CVE-2026-9155 affects products from gnu, linux, specifically: linux_kernel, sed. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-9155? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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