CVE-2026-15328 json
IBM WebSphere Application Server and WebSphere Application Server Liberty is inconsistent Interpretation of HTTP Requests
published 2026-07-28 3 mo ago modified 2026-09-23 46 d ago also EUVD-2026-50020
- cvss
- 7.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 33%
- public exploits
- 0
- none known
Summary
IBM WebSphere Application Server and IBM WebSphere Application Server - Liberty is vulnerable to HTTP request smuggling.
Patch / fix
- ibm websphere_application_server 8.5.5.31, 9.0.5.29, 26.0.0.8
- ibm.com/support/pages/node/7281625 advisory
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- IBM WebSphere Application Server
- IBM WebSphere Application Server - Liberty
Classification
- Weakness
-
- CWE-444 Inconsistent Interpretation of HTTP Requests
References
-
ibm.com
/support/pages/node/7281625
vendor-advisory, patch
Sources
- CVE List CVE-2026-15328
- NVD CVE-2026-15328
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.