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High severity · published Jul 30, 2026
CVE-2026-11897
IBM WebSphere Application Server Liberty is affected by a denial of service vulnerability with HTTP/2
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.7 is vulnerable to a denial of service, caused by sending a specially crafted request. A remote attacker could exploit this vulnerability to cause the server to consume memory resources.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% 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
17.0.0.3 through 26.0.0.7 · source: vendor
WA
Websphere Application Server · Ibm
17.0.0.3 before 26.0.0.8 · source: NVD
Affected product
WA
WebSphere Application Server - Liberty
IBM
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-11897
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-11897
Vendor Advisory
https://www.ibm.com/support/pages/node/7280695
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