CVE-2026-9338

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-09-10. A secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to trigger excessive resource consumption, potentially leading to reduced availability of the affected service.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100

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 (value × EchelonGraph’s weight)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
0.5%
EPSS %ILE
40th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 10, 2026

Last Modified

September 16, 2026

Advisory Details (1)

Auto-updated Sep 10, 2026
Fix referenced — no release confirmed yet.
Web page

Security Bulletin: IBM WebSphere Application Server prior to 9.0.5.29 and 8.5.5.31 are affected by multiple vulnerabilities

https://www.ibm.com/support/pages/node/7286610

Vendor Advisories for CVE-2026-9338(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 25× in last 7d / 86× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 94 is merged into the row it repeats.

  1. 2026-10-11 19:12 UTCEG score recompute
  2. 2026-10-11 16:28 UTCEG score recompute
  3. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-10-11 13:42 UTCEG score recompute
  5. 2026-10-11 10:13 UTCEG score recompute
  6. 2026-10-11 10:13 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  7. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-10-10 08:07 UTCEG score recompute
  9. 2026-10-10 08:07 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  10. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  11. 2026-10-09 07:01 UTCEG score recompute
  12. 2026-10-09 07:01 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  13. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  14. 2026-10-08 06:33 UTCEG score recompute
  15. 2026-10-08 06:33 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  16. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  17. 2026-10-07 06:05 UTCEG score recompute
  18. 2026-10-07 06:05 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  19. 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  20. 2026-10-06 05:37 UTCEG score recompute
  21. 2026-10-06 05:37 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  22. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  23. 2026-10-05 04:57 UTCEG score recompute
  24. 2026-10-05 04:57 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  25. 2026-10-04 23:23 UTCEPSS rescoreEPSS 0.5% · 39th percentile
Show 68 more
  1. 2026-10-04 04:30 UTCEG score recompute
  2. 2026-10-04 04:29 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  3. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  4. 2026-10-03 04:02 UTCEG score recompute
  5. 2026-10-03 04:02 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  6. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  7. 2026-10-02 03:27 UTCEG score recompute
  8. 2026-10-02 03:27 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  9. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  10. 2026-10-01 02:22 UTCEG score recompute
  11. 2026-10-01 02:22 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  12. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-09-30 01:55 UTCEG score recompute
  14. 2026-09-30 01:55 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  15. 2026-09-29 01:15 UTCEG score recompute
  16. 2026-09-29 01:15 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  17. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  18. 2026-09-28 00:48 UTCEG score recompute
  19. 2026-09-28 00:48 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  20. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  21. 2026-09-27 00:21 UTCEG score recompute
  22. 2026-09-27 00:21 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  23. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  24. 2026-09-25 23:53 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  25. 2026-09-24 23:08 UTCEG score recompute
  26. 2026-09-24 23:08 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  27. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  28. 2026-09-23 22:31 UTCEG score recompute
  29. 2026-09-23 22:31 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  30. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  31. 2026-09-22 22:04 UTCEG score recompute
  32. 2026-09-22 22:04 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  33. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  34. 2026-09-21 21:37 UTCEG score recompute
  35. 2026-09-21 21:37 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  36. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  37. 2026-09-20 21:09 UTCEG score recompute
  38. 2026-09-20 21:09 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  39. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  40. 2026-09-19 20:42 UTCEG score recompute
  41. 2026-09-19 20:42 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  42. 2026-09-18 20:15 UTCEG score recompute
  43. 2026-09-18 20:14 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  44. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  45. 2026-09-17 19:46 UTCEG score recompute
  46. 2026-09-17 19:46 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  47. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  48. 2026-09-16 18:27 UTCEG score recompute
  49. 2026-09-16 18:27 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  50. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  51. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  52. 2026-09-15 22:15 UTCEG score recompute
  53. 2026-09-15 22:15 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  54. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  55. 2026-09-14 21:47 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  56. 2026-09-13 21:20 UTCEG score recompute
  57. 2026-09-13 21:20 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  58. 2026-09-13 16:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  59. 2026-09-12 20:53 UTCEG score recompute
  60. 2026-09-12 20:53 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  61. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  62. 2026-09-11 20:25 UTCEG score recompute
  63. 2026-09-11 20:25 UTCGHSA enrichmentGHSA-p349-w9qj-fpxx · GitHub CVSS 5.3
  64. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  65. 2026-09-10 19:18 UTCEG score recompute
  66. 2026-09-10 19:10 UTCEG score recompute
  67. 2026-09-10 18:50 UTCEG score recomputeFirst assessed: 5.3 MEDIUM
  68. 2026-09-10 18:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9338?
CVE-2026-9338 is a medium-severity vulnerability; its CVE record was published on September 10, 2026. IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to trigger excessive resource consumption, potentially leading to reduced availability of the affected service.
When was the CVE record for CVE-2026-9338 published?
The CVE record for CVE-2026-9338 was published on September 10, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 16, 2026; the record at its source may have been updated since.
Is CVE-2026-9338 actively exploited?
CVE-2026-9338 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-9338?
CVE-2026-9338 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-9338?
A fix for CVE-2026-9338 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-9338 are linked in the Vendor Advisories panel on this page.

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