🛡️ CVE-2026-8620 — websphere-application-server

🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-444 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 8.5, 9.0 IBM WebSphere Application Server and WebSphere Application Server Liberty are vulnerable to HTTP request smuggling in the Web Server Plug-ins through a specially crafted request.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity low, availability none.

Weakness class

CVE-2026-8620 is classified as CWE-444: HTTP Request Smuggling. A proxy and a server disagree on where one request ends, letting an attacker slip a second request past the front end.

Affected software

CVE-2026-8620 is recorded against 2 packages.

  • unknown
  • websphere-application-server (from 9.0.0.0 up to 9.0.5.28)

Timeline and source

Published on 26 May 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

www.ibm.com

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
CWE CWE-444
Public Exploit ✅ No
Source NVD
Published 2026-05-26
Updated 2026-08-11
Modified 2026-05-26

Affected Packages

Software From version Fixed in
unknown — —
websphere-application-server 9.0.0.0 9.0.5.28

Similar Threats

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