CVE-2026-8644

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-01. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

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

IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to identity spoofing.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
25.4%
KEV
Not listed

Published

June 1, 2026

Last Modified

July 22, 2026

Advisory Details (1)

Auto-updated Jun 2, 2026
No patch confirmed yet.
generic

Security Bulletin: IBM WebSphere Application Server is affected by an identity spoofing vulnerability (CVE-2026-8644)

https://www.ibm.com/support/pages/node/7274740

Vendor Advisories for CVE-2026-8644(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 / 85× 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 204 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-8644?
CVE-2026-8644 is a critical vulnerability published on June 1, 2026. IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to identity spoofing.
When was CVE-2026-8644 disclosed?
CVE-2026-8644 was first published in the National Vulnerability Database on June 1, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8644 actively exploited?
CVE-2026-8644 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8644?
CVE-2026-8644 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-8644?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8644, 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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