CVE-2026-9155

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
8.8
EG Score
8.8(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
74%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 27, 2026

Advisory Details (1)

Auto-updated Jun 25, 2026
No patch confirmed yet.
generic

Rapid7 Extensions

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

Vendor Advisories for CVE-2026-9155(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 66× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 210 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 09:38 UTCEPSS rescore
  3. 2026-09-10 09:35 UTCEPSS rescore
  4. 2026-09-08 22:01 UTCEPSS rescore
  5. 2026-09-06 13:48 UTCEPSS rescore
  6. 2026-09-05 15:31 UTCEPSS rescore
  7. 2026-09-04 05:07 UTCEPSS rescore
  8. 2026-09-02 14:12 UTCEPSS rescore
  9. 2026-09-01 13:54 UTCEPSS rescore
  10. 2026-09-01 04:40 UTCEPSS rescore
  11. 2026-08-30 19:48 UTCEG score recompute
  12. 2026-08-30 19:48 UTCGHSA enrichment
  13. 2026-08-30 19:18 UTCEPSS rescore
  14. 2026-08-30 01:22 UTCEPSS rescore
  15. 2026-08-28 21:42 UTCEPSS rescore
  16. 2026-08-28 02:57 UTCEG score recompute
  17. 2026-08-28 02:57 UTCGHSA enrichment
  18. 2026-08-27 14:25 UTCEPSS rescore
  19. 2026-08-26 14:47 UTCEPSS rescore
  20. 2026-08-25 13:49 UTCEPSS rescore
  21. 2026-08-25 01:32 UTCEG score recompute
  22. 2026-08-25 01:32 UTCGHSA enrichment
  23. 2026-08-24 14:18 UTCEPSS rescore
  24. 2026-08-24 13:17 UTCEG score recompute
  25. 2026-08-24 13:17 UTCGHSA enrichment
Show 75 more
  1. 2026-08-23 23:48 UTCGHSA enrichment
  2. 2026-08-23 11:34 UTCEG score recompute
  3. 2026-08-23 11:34 UTCGHSA enrichment
  4. 2026-08-23 00:19 UTCEPSS rescore
  5. 2026-08-22 23:20 UTCGHSA enrichment
  6. 2026-08-22 11:03 UTCEG score recompute
  7. 2026-08-22 11:03 UTCGHSA enrichment
  8. 2026-08-21 23:49 UTCEPSS rescore
  9. 2026-08-21 19:54 UTCGHSA enrichment
  10. 2026-08-21 07:40 UTCEG score recompute
  11. 2026-08-21 07:40 UTCGHSA enrichment
  12. 2026-08-20 22:56 UTCEPSS rescore
  13. 2026-08-20 19:26 UTCGHSA enrichment
  14. 2026-08-20 07:12 UTCEG score recompute
  15. 2026-08-20 07:12 UTCGHSA enrichment
  16. 2026-08-19 17:04 UTCEPSS rescore
  17. 2026-08-19 14:14 UTCGHSA enrichment
  18. 2026-08-19 01:38 UTCEG score recompute
  19. 2026-08-19 01:38 UTCGHSA enrichment
  20. 2026-08-18 13:49 UTCEPSS rescore
  21. 2026-08-17 13:47 UTCEPSS rescore
  22. 2026-08-17 11:18 UTCGHSA enrichment
  23. 2026-08-16 23:04 UTCEG score recompute
  24. 2026-08-16 23:04 UTCGHSA enrichment
  25. 2026-08-16 14:56 UTCEPSS rescore
  26. 2026-08-16 14:56 UTCEPSS rescore
  27. 2026-08-16 10:49 UTCEG score recompute
  28. 2026-08-16 10:49 UTCGHSA enrichment
  29. 2026-08-16 02:15 UTCEPSS rescore
  30. 2026-08-15 22:36 UTCGHSA enrichment
  31. 2026-08-15 10:22 UTCEG score recompute
  32. 2026-08-15 10:22 UTCGHSA enrichment
  33. 2026-08-15 01:31 UTCEPSS rescore
  34. 2026-08-14 22:07 UTCGHSA enrichment
  35. 2026-08-14 09:47 UTCEG score recompute
  36. 2026-08-14 09:47 UTCGHSA enrichment
  37. 2026-08-13 22:00 UTCEPSS rescore
  38. 2026-08-13 21:33 UTCGHSA enrichment
  39. 2026-08-13 08:45 UTCGHSA enrichment
  40. 2026-08-12 20:30 UTCEG score recompute
  41. 2026-08-12 20:30 UTCGHSA enrichment
  42. 2026-08-12 13:51 UTCEPSS rescore
  43. 2026-08-12 08:16 UTCGHSA enrichment
  44. 2026-08-11 20:02 UTCEG score recompute
  45. 2026-08-11 20:02 UTCGHSA enrichment
  46. 2026-08-11 13:43 UTCEPSS rescore
  47. 2026-08-11 07:48 UTCEG score recompute
  48. 2026-08-11 07:48 UTCGHSA enrichment
  49. 2026-08-11 00:00 UTCEPSS rescore
  50. 2026-08-10 19:34 UTCGHSA enrichment
  51. 2026-08-10 07:19 UTCGHSA enrichment
  52. 2026-08-09 19:06 UTCEG score recompute
  53. 2026-08-09 19:06 UTCGHSA enrichment
  54. 2026-08-09 13:47 UTCEPSS rescore
  55. 2026-08-09 06:52 UTCGHSA enrichment
  56. 2026-08-08 18:38 UTCEG score recompute
  57. 2026-08-08 18:38 UTCGHSA enrichment
  58. 2026-08-08 16:37 UTCEPSS rescore
  59. 2026-08-08 06:23 UTCGHSA enrichment
  60. 2026-08-07 18:09 UTCEG score recompute
  61. 2026-08-07 18:09 UTCGHSA enrichment
  62. 2026-08-07 16:30 UTCEPSS rescore
  63. 2026-08-07 05:55 UTCGHSA enrichment
  64. 2026-08-06 17:42 UTCEG score recompute
  65. 2026-08-06 17:42 UTCGHSA enrichment
  66. 2026-08-06 13:47 UTCEPSS rescore
  67. 2026-08-06 05:26 UTCEG score recompute
  68. 2026-08-06 05:26 UTCGHSA enrichment
  69. 2026-08-05 19:17 UTCEPSS rescore
  70. 2026-08-05 19:17 UTCEPSS rescore
  71. 2026-08-05 17:12 UTCGHSA enrichment
  72. 2026-08-04 22:16 UTCEG score recompute
  73. 2026-08-04 22:16 UTCGHSA enrichment
  74. 2026-08-04 15:10 UTCEPSS rescore
  75. 2026-08-04 10:39 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9155?
CVE-2026-9155 is a high vulnerability published on June 25, 2026. 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.
When was CVE-2026-9155 disclosed?
CVE-2026-9155 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9155 actively exploited?
CVE-2026-9155 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 25.7% of all scored CVEs.
What is the CVSS score of CVE-2026-9155?
CVE-2026-9155 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-9155?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9155, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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