CVE-2026-8646

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 74% 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
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 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are vulnerable to HTTP request smuggling. A remote attacker could smuggle a specially crafted request to the application server thereby allowing the attacker to bypass security controls, spoof identity, escalate privilege, and expose sensitive information.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
26.2%
KEV
Not listed

Published

June 22, 2026

Last Modified

June 24, 2026

Advisory Details (1)

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

Security Bulletin: IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities (CVE-2026-8646, CVE-2026-9320, CVE-2026-9071)

https://www.ibm.com/support/pages/node/7276579

Vendor Advisories for CVE-2026-8646(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 11× in last 7d / 87× 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.

  1. 2026-07-23 03:23 UTCEG score recompute▲ 1.70
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:25 UTCEPSS rescore
  4. 2026-07-21 15:25 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 02:29 UTCEPSS rescore
  8. 2026-07-18 10:04 UTCEPSS rescore
  9. 2026-07-17 05:58 UTCGHSA enrichment
  10. 2026-07-16 18:56 UTCGHSA enrichment
  11. 2026-07-16 17:03 UTCEPSS rescore
  12. 2026-07-16 07:28 UTCGHSA enrichment
  13. 2026-07-15 20:26 UTCGHSA enrichment
  14. 2026-07-15 16:57 UTCEPSS rescore
  15. 2026-07-15 09:23 UTCGHSA enrichment
  16. 2026-07-15 02:00 UTCEPSS rescore
  17. 2026-07-14 22:19 UTCGHSA enrichment
  18. 2026-07-14 11:17 UTCGHSA enrichment
  19. 2026-07-14 00:08 UTCGHSA enrichment
  20. 2026-07-13 22:31 UTCEPSS rescore
  21. 2026-07-13 13:02 UTCGHSA enrichment
  22. 2026-07-13 06:13 UTCEPSS rescore
  23. 2026-07-13 02:00 UTCGHSA enrichment
  24. 2026-07-12 14:57 UTCGHSA enrichment
  25. 2026-07-12 05:46 UTCEPSS rescore
Show 65 more
  1. 2026-07-12 03:48 UTCGHSA enrichment
  2. 2026-07-11 16:45 UTCGHSA enrichment
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-11 05:43 UTCGHSA enrichment
  5. 2026-07-10 18:40 UTCGHSA enrichment
  6. 2026-07-10 07:38 UTCGHSA enrichment
  7. 2026-07-09 20:34 UTCGHSA enrichment
  8. 2026-07-09 19:10 UTCEPSS rescore
  9. 2026-07-09 09:30 UTCGHSA enrichment
  10. 2026-07-08 22:28 UTCGHSA enrichment
  11. 2026-07-08 15:16 UTCEPSS rescore
  12. 2026-07-08 11:26 UTCGHSA enrichment
  13. 2026-07-08 00:24 UTCGHSA enrichment
  14. 2026-07-07 13:46 UTCEPSS rescore
  15. 2026-07-07 13:21 UTCGHSA enrichment
  16. 2026-07-07 02:19 UTCGHSA enrichment
  17. 2026-07-06 16:27 UTCEPSS rescore
  18. 2026-07-06 16:27 UTCEPSS rescore
  19. 2026-07-06 15:08 UTCGHSA enrichment
  20. 2026-07-06 03:55 UTCGHSA enrichment
  21. 2026-07-06 02:23 UTCEPSS rescore
  22. 2026-07-06 02:23 UTCEPSS rescore
  23. 2026-07-05 16:53 UTCGHSA enrichment
  24. 2026-07-05 05:40 UTCGHSA enrichment
  25. 2026-07-05 02:31 UTCEPSS rescore
  26. 2026-07-05 02:30 UTCEPSS rescore
  27. 2026-07-04 18:37 UTCGHSA enrichment
  28. 2026-07-04 07:32 UTCGHSA enrichment
  29. 2026-07-04 06:31 UTCEPSS rescore
  30. 2026-07-04 06:31 UTCEPSS rescore
  31. 2026-07-03 20:12 UTCGHSA enrichment
  32. 2026-07-03 09:10 UTCGHSA enrichment
  33. 2026-07-02 22:08 UTCGHSA enrichment
  34. 2026-07-02 11:06 UTCGHSA enrichment
  35. 2026-07-01 23:43 UTCGHSA enrichment
  36. 2026-07-01 15:07 UTCEPSS rescore
  37. 2026-07-01 12:41 UTCGHSA enrichment
  38. 2026-07-01 01:39 UTCGHSA enrichment
  39. 2026-06-30 23:22 UTCEPSS rescore
  40. 2026-06-30 14:37 UTCGHSA enrichment
  41. 2026-06-30 03:29 UTCGHSA enrichment
  42. 2026-06-29 16:27 UTCGHSA enrichment
  43. 2026-06-29 05:24 UTCGHSA enrichment
  44. 2026-06-28 18:18 UTCGHSA enrichment
  45. 2026-06-28 14:07 UTCEPSS rescore
  46. 2026-06-28 07:15 UTCGHSA enrichment
  47. 2026-06-28 04:56 UTCEPSS rescore
  48. 2026-06-27 20:14 UTCGHSA enrichment
  49. 2026-06-27 09:12 UTCGHSA enrichment
  50. 2026-06-27 03:08 UTCEPSS rescore
  51. 2026-06-26 22:10 UTCGHSA enrichment
  52. 2026-06-26 11:07 UTCGHSA enrichment
  53. 2026-06-25 23:03 UTCGHSA enrichment
  54. 2026-06-25 13:50 UTCEPSS rescore
  55. 2026-06-25 12:00 UTCGHSA enrichment
  56. 2026-06-25 00:58 UTCGHSA enrichment
  57. 2026-06-24 14:05 UTCEPSS rescore
  58. 2026-06-24 13:56 UTCGHSA enrichment
  59. 2026-06-24 05:30 UTCNVD updateCVSS v3 → 9.1 · severity → CRITICAL
  60. 2026-06-24 02:55 UTCGHSA enrichment
  61. 2026-06-23 21:33 UTCEPSS rescore
  62. 2026-06-23 15:52 UTCGHSA enrichment
  63. 2026-06-23 04:50 UTCGHSA enrichment
  64. 2026-06-22 17:49 UTCEG score recompute
  65. 2026-06-22 17:45 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8646?
CVE-2026-8646 is a critical vulnerability published on June 22, 2026. IBM WebSphere Application Server 9.0 and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are vulnerable to HTTP request smuggling. A remote attacker could smuggle a specially crafted request to the application server thereby allowing the attacker to bypass security…
When was CVE-2026-8646 disclosed?
CVE-2026-8646 was first published in the National Vulnerability Database on June 22, 2026, with the most recent update on June 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8646 actively exploited?
CVE-2026-8646 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 26.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8646?
CVE-2026-8646 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-8646?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8646, 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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