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[NEW] [medium] IBM WebSphere Application Server Liberty: Vulnerability allows denial of service

mediumCVE-2026-9563
A remote, anonymous attacker can exploit a vulnerability in IBM WebSphere Application Server Liberty to conduct a denial of service attack.

CSIRTS triage

vendor: IBMproduct: WebSphere Application Server LibertyDenial of service
What
A vulnerability allows a remote attacker to conduct a denial of service attack.
Who is affected
Users of IBM WebSphere Application Server Liberty are affected.
Urgency
Remediation is medium urgency due to the nature of the vulnerability.
Action
Update to the latest version of IBM WebSphere Application Server Liberty.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
medium
Published
2026-09-02
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2233

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-9563coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for IBM WebSphere Application

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CERT-Bund (BSI) Security Advisories