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7.5

IBM WebSphere Liberty: Unsecured File Access with restConnector-2.0

CVE-2026-11806 · published 4 months ago
Summary

IBM WebSphere Liberty users with the restConnector-2.0 feature enabled may be at risk of unauthorized access to sensitive files. This could lead to the exposure of confidential data. To mitigate this risk, disable the restConnector-2.0 feature or upgrade to a fixed version of IBM WebSphere Liberty.

What to do
  • Update ibm websphere_application_server to version 26.0.0.7 or later.
Affected software
VendorProductAffected versions
ibm websphere_application_server >= 17.0.0.3, < 26.0.0.7
cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:*
Original advisory text
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 is affected by an arbitrary file read vulnerability with the restConnector-2.0 feature enabled.
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 is affected by an arbitrary file read vulnerability with the restConnector-2.0 feature enabled.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
7.5 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Timeline
Published30 Jun 2026
Updated4 Nov 2026
First seen30 Jun 2026
Sources
CVE-2026-11806 · NVD
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