PatchTheCVECVE-2026-11897: IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.7 is vulnerable to a denial of service, cau
42
This month
HIGH 7.5REMOTEUPGRADE
CVE-2026-11897 is a high-severity flaw (CVSS 7.5) affecting websphere application server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.5% (top 56%) |
| CISA exploited list | No |
| Weakness | CWE-770 |
| Published | 2026-07-30 |
| Last modified | 2026-10-23 |
Publisher (CNA): IBM Corporation · Vendor: ibm
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
ibm websphere application server UPGRADE
Affected: >= 17.0.0.3 and < 26.0.0.8
Fixed in: 26.0.0.8
Safe to downgrade to: a release before 17.0.0.3
1. Check installed version
apt-cache policy websphere-application-server || rpm -q websphere-application-server || websphere-application-server --version
2. UPGRADE to 26.0.0.8 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade websphere-application-server
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade websphere-application-server
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 17.0.0.3 (Debian / Ubuntu)
apt-cache madison websphere-application-server
sudo apt install websphere-application-server=<VERSION_BEFORE_17.0.0.3>
sudo apt-mark hold websphere-application-server
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list websphere-application-server
sudo dnf downgrade websphere-application-server-<VERSION_BEFORE_17.0.0.3>
sudo dnf versionlock add websphere-application-server
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Exact fixes by distribution
Fedora 46 · kwin-zones · FIXED · 1.0.13-1.fc46 · FEDORA-2026-95888f332b · source
sudo dnf upgrade --advisory=FEDORA-2026-95888f332b
Fedora ELN · nginx-mod-brotli · FIXED · 1.0.0~rc-16.eln159 · FEDORA-2026-501a6a8273 · source
sudo dnf upgrade --advisory=FEDORA-2026-501a6a8273
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Related CVEs
- CVE-2026-14512 CRITICAL 9.8 UPGRADE IBM WebSphere Application Server 9.0, and 8.5 traditional is vulnerable to pre-authentication unsafe deseriali
- CVE-2026-14446 CRITICAL 9.8 UPGRADE IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to broken access control/privilege escalation in t
- CVE-2026-14974 HIGH 8.1 UPGRADE IBM WebSphere Application Server 8.5, and 9.0 traditional could allow a remote attacker to execute arbitrary c
- CVE-2026-15280 HIGH 7.5 UPGRADE IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 ND Collective Controller is affected by a
- CVE-2026-15057 HIGH 7.5 UPGRADE IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.7 is vulnerable to a denial of service due