CVE-2026-3366

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-27. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

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

IBM InfoSphere Optim Test Data Fabrication 1.0.0, 1.0.0.1, 1.0.0.2, 1.0.2, 1.0.2.2, 1.0.2.3, 1.0.2.4, 1.0.2.5, 1.0.2.6, 1.0.2.7 could allow a remote attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot" sequences (/../) to view arbitrary files on the system

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

May 27, 2026

Last Modified

June 2, 2026

Advisory Details (1)

Auto-updated Jun 11, 2026
No patch confirmed yet.
generic

Security Bulletin: InfoSphere Optim Test Data Fabrication is affected by Arbitrary File Read (CVE-2026-3366)

https://www.ibm.com/support/pages/node/7272653

Vendor Advisories for CVE-2026-3366(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 9× in last 7d / 36× 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 237 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-3366?
CVE-2026-3366 is a high vulnerability published on May 27, 2026. IBM InfoSphere Optim Test Data Fabrication 1.0.0, 1.0.0.1, 1.0.0.2, 1.0.2, 1.0.2.2, 1.0.2.3, 1.0.2.4, 1.0.2.5, 1.0.2.6, 1.0.2.7 could allow a remote attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot" sequences (/../) to view…
When was CVE-2026-3366 disclosed?
CVE-2026-3366 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on June 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-3366 actively exploited?
CVE-2026-3366 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 53.3% of all scored CVEs.
What is the CVSS score of CVE-2026-3366?
CVE-2026-3366 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-3366?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3366, 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

Explore the affected products and dependency analysis for CVE-2026-3366

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