CVE-2026-8858

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 66% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: 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 and IBM WebSphere Application Server Liberty are vulnerable to remote code execution and denial of service in the WebSphere Web Server Plug-in component. This vulnerability can be exploited when an attacker impersonates the application server and sends crafted responses to the plug-in.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

June 22, 2026

Last Modified

July 9, 2026

Advisory Details (1)

Auto-updated Jun 22, 2026
No patch confirmed yet.
generic

Security Bulletin: IBM i is Affected By Denial of Service, HTTP Request Smuggling, and Remote Code Execution Vulnerabilities in IBM WebSphere Application Server Liberty [CVE-2026-10852, CVE-2026-8858, CVE-2026-9072, CVE-2026-8633, CVE-2026-8620]

https://www.ibm.com/support/pages/node/7277344

Vendor Advisories for CVE-2026-8858(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 / 94× 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 210 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-8858?
CVE-2026-8858 is a high vulnerability published on June 22, 2026. IBM WebSphere Application Server and IBM WebSphere Application Server Liberty are vulnerable to remote code execution and denial of service in the WebSphere Web Server Plug-in component. This vulnerability can be exploited when an attacker impersonates the application server and sends crafted…
When was CVE-2026-8858 disclosed?
CVE-2026-8858 was first published in the National Vulnerability Database on June 22, 2026, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8858 actively exploited?
CVE-2026-8858 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 66.0% of all scored CVEs.
What is the CVSS score of CVE-2026-8858?
CVE-2026-8858 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-8858?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8858, 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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