CVE-2026-33466

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 57% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

Improper Limitation of a Pathname to a Restricted Directory (CWE-22) in Logstash can lead to arbitrary file write and potentially remote code execution via Relative Path Traversal (CAPEC-139). The archive extraction utilities used by Logstash do not properly validate file paths within compressed archives. An attacker who can serve a specially crafted archive to Logstash through a compromised or attacker-controlled update endpoint can write arbitrary files to the host filesystem with the privileges of the Logstash process. In certain configurations where automatic pipeline reloading is enabled, this can be escalated to remote code execution.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

April 8, 2026

Last Modified

July 24, 2026

Advisory Details (1)

Auto-updated Sep 12, 2026
No patch confirmed yet.
generic

Logstash 8.19.14, 9.2.8, 9.3.3 Security Update (ESA-2026-29) - Security Announcements - Discuss the Elastic Stack

https://discuss.elastic.co/t/logstash-8-19-14-9-2-8-9-3-3-security-update-esa-2026-29/385816

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 32× 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 219 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-33466?
CVE-2026-33466 is a critical vulnerability published on April 8, 2026. Improper Limitation of a Pathname to a Restricted Directory (CWE-22) in Logstash can lead to arbitrary file write and potentially remote code execution via Relative Path Traversal (CAPEC-139). The archive extraction utilities used by Logstash do not properly validate file paths within compressed…
When was CVE-2026-33466 disclosed?
CVE-2026-33466 was first published in the National Vulnerability Database on April 8, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33466 actively exploited?
CVE-2026-33466 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 55.9% of all scored CVEs.
What is the CVSS score of CVE-2026-33466?
CVE-2026-33466 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-33466?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33466, 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.

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