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
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 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 PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

June 1, 2026

Last Modified

July 22, 2026

Advisory Details (1)

Auto-updated Sep 16, 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 8× in last 7d / 48× 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 376 total refreshes for this CVE.

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

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 0% probability of exploitation in the next 30 days, which ranks it in the top 73.9% of all scored CVEs.
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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