CVE-2026-66756

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory published 2026-07-30. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%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 Protection of Alternate Path vulnerability in Apache Tika.

This issue affects Apache Tika: from 4.0.0-alpha-1 before 4.0.0-beta-1.

Users are recommended to upgrade to version 4.0.0-beta-1, which fixes the issue.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

July 30, 2026

Last Modified

August 10, 2026

Advisory Details (2)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-66756: Apache Tika: unpack endpoint in tika-server allows configuration with unsecureFeatures=false

http://www.openwall.com/lists/oss-security/2026/07/30/24
generic
https://lists.apache.org/thread/ynjg5lxwhqpc83pczf5y5561o2l4o568

Vendor Advisories for CVE-2026-66756(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 51× in last 7d / 115× 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 115 total refreshes for this CVE.

  1. 2026-08-21 05:33 UTCGHSA enrichment
  2. 2026-08-21 01:18 UTCEG score recompute
  3. 2026-08-21 01:18 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-20 21:04 UTCGHSA enrichment
  6. 2026-08-20 16:50 UTCGHSA enrichment
  7. 2026-08-20 12:26 UTCGHSA enrichment
  8. 2026-08-20 08:12 UTCGHSA enrichment
  9. 2026-08-20 03:58 UTCGHSA enrichment
  10. 2026-08-19 23:43 UTCGHSA enrichment
  11. 2026-08-19 19:29 UTCEG score recompute
  12. 2026-08-19 19:28 UTCGHSA enrichment
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-19 13:26 UTCGHSA enrichment
  15. 2026-08-19 09:06 UTCGHSA enrichment
  16. 2026-08-19 04:52 UTCGHSA enrichment
  17. 2026-08-19 00:38 UTCGHSA enrichment
  18. 2026-08-18 20:08 UTCGHSA enrichment
  19. 2026-08-18 15:52 UTCEG score recompute
  20. 2026-08-18 15:52 UTCGHSA enrichment
  21. 2026-08-18 13:48 UTCEPSS rescore
  22. 2026-08-18 09:45 UTCGHSA enrichment
  23. 2026-08-18 05:31 UTCGHSA enrichment
  24. 2026-08-18 01:02 UTCGHSA enrichment
  25. 2026-08-17 20:48 UTCGHSA enrichment
Show 75 more
  1. 2026-08-17 16:33 UTCEG score recompute
  2. 2026-08-17 16:33 UTCGHSA enrichment
  3. 2026-08-17 13:47 UTCEPSS rescore
  4. 2026-08-17 11:57 UTCGHSA enrichment
  5. 2026-08-17 07:43 UTCGHSA enrichment
  6. 2026-08-17 03:29 UTCGHSA enrichment
  7. 2026-08-16 23:15 UTCGHSA enrichment
  8. 2026-08-16 19:00 UTCEG score recompute
  9. 2026-08-16 19:00 UTCGHSA enrichment
  10. 2026-08-16 14:56 UTCEPSS rescore
  11. 2026-08-16 14:40 UTCGHSA enrichment
  12. 2026-08-16 10:25 UTCGHSA enrichment
  13. 2026-08-16 06:11 UTCEG score recompute
  14. 2026-08-16 06:11 UTCGHSA enrichment
  15. 2026-08-16 01:57 UTCGHSA enrichment
  16. 2026-08-15 21:43 UTCGHSA enrichment
  17. 2026-08-15 17:29 UTCGHSA enrichment
  18. 2026-08-15 13:15 UTCGHSA enrichment
  19. 2026-08-15 09:00 UTCGHSA enrichment
  20. 2026-08-15 04:45 UTCEG score recompute
  21. 2026-08-15 04:45 UTCGHSA enrichment
  22. 2026-08-15 01:30 UTCEPSS rescore
  23. 2026-08-15 00:30 UTCGHSA enrichment
  24. 2026-08-14 20:16 UTCGHSA enrichment
  25. 2026-08-14 16:02 UTCGHSA enrichment
  26. 2026-08-14 11:48 UTCGHSA enrichment
  27. 2026-08-14 07:34 UTCGHSA enrichment
  28. 2026-08-14 03:19 UTCGHSA enrichment
  29. 2026-08-13 23:05 UTCEG score recompute
  30. 2026-08-13 23:05 UTCGHSA enrichment
  31. 2026-08-13 22:00 UTCEPSS rescore
  32. 2026-08-13 18:49 UTCGHSA enrichment
  33. 2026-08-13 14:34 UTCGHSA enrichment
  34. 2026-08-13 10:20 UTCGHSA enrichment
  35. 2026-08-13 06:05 UTCGHSA enrichment
  36. 2026-08-13 01:51 UTCGHSA enrichment
  37. 2026-08-12 21:36 UTCGHSA enrichment
  38. 2026-08-12 17:22 UTCEG score recompute
  39. 2026-08-12 17:22 UTCGHSA enrichment
  40. 2026-08-12 13:51 UTCEPSS rescore
  41. 2026-08-12 13:08 UTCGHSA enrichment
  42. 2026-08-12 08:53 UTCGHSA enrichment
  43. 2026-08-12 04:39 UTCGHSA enrichment
  44. 2026-08-12 00:25 UTCGHSA enrichment
  45. 2026-08-11 20:11 UTCGHSA enrichment
  46. 2026-08-11 15:56 UTCEG score recompute
  47. 2026-08-11 15:56 UTCGHSA enrichment
  48. 2026-08-11 11:42 UTCGHSA enrichment
  49. 2026-08-11 07:28 UTCGHSA enrichment
  50. 2026-08-11 03:14 UTCEG score recompute
  51. 2026-08-11 03:14 UTCGHSA enrichment
  52. 2026-08-11 00:00 UTCEPSS rescore
  53. 2026-08-10 23:00 UTCGHSA enrichment
  54. 2026-08-10 18:46 UTCEG score recompute
  55. 2026-08-10 18:46 UTCGHSA enrichment
  56. 2026-08-10 14:31 UTCEG score recompute▲ 2.90
  57. 2026-08-10 14:31 UTCGHSA enrichment
  58. 2026-08-10 14:28 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  59. 2026-08-10 08:40 UTCEG score recompute
  60. 2026-08-10 08:40 UTCGHSA enrichment
  61. 2026-08-09 13:47 UTCEPSS rescore
  62. 2026-08-09 07:28 UTCEG score recompute
  63. 2026-08-09 07:28 UTCGHSA enrichment
  64. 2026-08-08 16:37 UTCEPSS rescore
  65. 2026-08-08 06:16 UTCEG score recompute
  66. 2026-08-08 06:16 UTCGHSA enrichment
  67. 2026-08-07 05:04 UTCEG score recompute
  68. 2026-08-07 05:04 UTCGHSA enrichment
  69. 2026-08-06 13:47 UTCEPSS rescore
  70. 2026-08-06 03:51 UTCEG score recompute
  71. 2026-08-06 03:51 UTCGHSA enrichment
  72. 2026-08-05 19:17 UTCEPSS rescore
  73. 2026-08-05 19:17 UTCEPSS rescore
  74. 2026-08-05 02:39 UTCEG score recompute
  75. 2026-08-05 02:39 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-66756?
CVE-2026-66756 is a critical vulnerability published on July 30, 2026. Improper Protection of Alternate Path vulnerability in Apache Tika. This issue affects Apache Tika: from 4.0.0-alpha-1 before 4.0.0-beta-1. Users are recommended to upgrade to version 4.0.0-beta-1, which fixes the issue.
When was CVE-2026-66756 disclosed?
CVE-2026-66756 was first published in the National Vulnerability Database on July 30, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66756 actively exploited?
CVE-2026-66756 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 62.8% of all scored CVEs.
What is the CVSS score of CVE-2026-66756?
CVE-2026-66756 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-66756?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66756, 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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