CVE-2026-18499

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-12. a secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: 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 - Liberty 17.0.0.3 through 26.0.0.8 is vulnerable to a privilege escalation when using Liberty collectives.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 17, 2026

Advisory Details (1)

Auto-updated Aug 12, 2026
No patch confirmed yet.
generic

Security Bulletin: IBM WebSphere Application Server Liberty is affected by a privilege escalation (CVE-2026-18499)

https://www.ibm.com/support/pages/node/7283489

Vendor Advisories for CVE-2026-18499(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 21× in last 7d / 103× 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 145 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-18499?
CVE-2026-18499 is a high vulnerability published on August 12, 2026. IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 is vulnerable to a privilege escalation when using Liberty collectives.
When was CVE-2026-18499 disclosed?
CVE-2026-18499 was first published in the National Vulnerability Database on August 12, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18499 actively exploited?
CVE-2026-18499 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 76.7% of all scored CVEs.
What is the CVSS score of CVE-2026-18499?
CVE-2026-18499 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-18499?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18499, 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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