CVE-2026-93895 IBM WebSphere Application Server Liberty - Access Control Bypass

IBM WebSphere Application Server Liberty 20.0.0.12 through 26.0.0.10 contains an access control bypass caused by improper enforcement on gRPC service methods, letting unauthenticated remote attackers bypass access controls.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.45% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Access Control Bypass
Impact
Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
13 October 2026
Updated
15 October 2026
Weakness
CWE-284

Vendor fix

Update to the latest version beyond 26.0.0.10.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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