CVE-2026-11541

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

IBM CICS Transaction Gateway for Multiplatforms 9.1, 9.2, 9.3, and 10.1 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 affected by an HTTP request smuggling vulnerability.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

June 30, 2026

Last Modified

July 29, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
Patch available.
generic Patch Available

Security Bulletin: Multiple vulnerabilities found in CICS Transaction Gateway for Multiplatforms.

https://www.ibm.com/support/pages/node/7281750
generic

Security Bulletin: IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by HTTP request smuggling (CVE-2026-11541)

https://www.ibm.com/support/pages/node/7277550

Vendor Advisories for CVE-2026-11541(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 37× in last 7d / 206× 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 274 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-11541?
CVE-2026-11541 is a critical vulnerability published on June 30, 2026. IBM CICS Transaction Gateway for Multiplatforms 9.1, 9.2, 9.3, and 10.1 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 affected by an HTTP request smuggling vulnerability.
When was CVE-2026-11541 disclosed?
CVE-2026-11541 was first published in the National Vulnerability Database on June 30, 2026, with the most recent update on July 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-11541 actively exploited?
CVE-2026-11541 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 65.5% of all scored CVEs.
What is the CVSS score of CVE-2026-11541?
CVE-2026-11541 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-11541?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11541, 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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