CVE-2026-8646 json
IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities
published 2026-06-22 4 mo ago modified 2026-06-24 4 mo ago also EUVD-2026-38251
- cvss
- 7.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- ibm websphere_application_server 8.5.5.30, 9.0.5.29, 26.0.0.7
- ibm.com/support/pages/node/7276579 advisory
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 4 mo ago
Exploit prediction
0.59% chance of exploitation in the next 30 days, higher than 48% 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 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
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/7276579
vendor-advisory, patch
Sources
- CVE List CVE-2026-8646
- NVD CVE-2026-8646
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