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Medium severity · published May 27, 2026
CVE-2026-5516
IBM WebSphere Application Server Liberty is affected by a security bypass vulnerability
5.9
CVSS
0.2%
EPSS
No
On KEV
Description
IBM WebSphere Application Server - Liberty 22.0.0.11 through 26.0.0.5 IBM WebSphere Application Server Liberty could allow a remote attacker to bypass security under limited conditions by exploiting a specific timing window.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WA
WebSphere Application Server - Liberty · IBM
22.0.0.11 through 26.0.0.5 · source: vendor
WA
Websphere Application Server · Ibm
22.0.0.11 through 26.0.0.5 · source: NVD
Affected product
WA
WebSphere Application Server - Liberty
IBM
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5516
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5516
Vendor Advisory
https://www.ibm.com/support/pages/node/7273425
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