CVE-2026-9155: gnu sed OS Command Injection
CVSS: 8.8v3.1HighAnalyzed
Published 25-06-2026Last modified 25-06-2026
Vulnerability summary
CVE-2026-9155 is a high (CVSS 8.8) OS Command Injection vulnerability in gnu sed. EPSS estimates a 1.60% chance of exploitation in the next 30 days, higher than 75.5% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (CVE.org)EPSS score
1.60%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 25-06-2026PublishedVulnerability first disclosed.
- 25-06-2026Last modifiedVulnerability information updated.
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 metrics
2 scores · 2 sources · 1 versionHigh 8.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.60%
Chance of exploitation in the next 30 days
Percentile
76%
Versus all other CVEs
30-day change
0.00 pp
From 1.60% on 22-09-2026
22-09-202622-10-2026
EPSS score1.60%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Gnu1 product
- sed4.2.2
Rapid71 product
- insightconnect sed plugin< 2.0.5
2 vendors · 2 products
References
1 links- extensions.rapid7.com/extension/sedVendor Advisory