CVE-2026-8633

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-26. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 8.5, 9.0 IBM WebSphere Application Server and WebSphere Application Server Liberty are vulnerable to remote code execution in the Web Server Plug-ins, through a specially crafted request.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
54.0%
KEV
Not listed

Published

May 26, 2026

Last Modified

May 27, 2026

Advisory Details (1)

Auto-updated Jun 20, 2026
No patch confirmed yet.
generic

Security Bulletin: IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities when using Web Server Plug-ins (CVE-2026-8633, CVE-2026-8620)

https://www.ibm.com/support/pages/node/7274072

Vendor Advisories for CVE-2026-8633(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 7× in last 7d / 58× 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 179 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8633?
CVE-2026-8633 is a critical vulnerability published on May 26, 2026. IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 8.5, 9.0 IBM WebSphere Application Server and WebSphere Application Server Liberty are vulnerable to remote code execution in the Web Server Plug-ins, through a specially crafted request.
When was CVE-2026-8633 disclosed?
CVE-2026-8633 was first published in the National Vulnerability Database on May 26, 2026, with the most recent update on May 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8633 actively exploited?
CVE-2026-8633 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 54.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8633?
CVE-2026-8633 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-8633?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8633, 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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