[NEW] [medium] IBM WebSphere Application Server Liberty: Multiple vulnerabilities allow denial of service

mediumCVE-2026-11897 CVE-2026-15057

An attacker can exploit multiple vulnerabilities in IBM WebSphere Application Server Liberty to conduct a denial of service attack.

CSIRTS triage

vendor: IBM product: WebSphere Application Server Liberty Denial of service

What: Multiple vulnerabilities allow for denial of service attacks.
Who is affected: Deployments of IBM WebSphere Application Server Liberty are affected.
Urgency: Remediation is important due to medium severity and potential for exploitation.
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: 2026-07-31
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-2026-2466

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.

Low exploitation riskCVE-2026-118970.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all scored CVEs.
Low exploitation riskCVE-2026-150570.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-11897	coverage & exploitation status	NVD · CVE.org
CVE-2026-15057	coverage & exploitation status	NVD · 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.

medium[NEU] [mittel] IBM WebSphere Application Server: Mehrere Schwachstellen ermöglichen Denial of Servicecert-bund · 2026-07-31
high[NEW] [high] IBM WebSphere Application Server and Application Server Liberty: Multiple vulnerabilitiescert-bund · 2026-07-31
medium[NEW] [medium] IBM WebSphere Application Server: Vulnerability allows bypassing security measurescert-bund · 2026-07-31
high[UPDATE] [high] IBM WebSphere Application Server and Application Server Liberty: Multiple vulnerabilitiescert-bund · 2026-07-31
highCVE-2026-11536: IBM WebSphere Application Server 9.0, and 8.5 is affected by a remote code execution vulnerabi…nvd · 2026-07-30
highCVE-2026-9322: IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17…nvd · 2026-07-30