[UPDATE] [high] IBM WebSphere Application Server: Multiple vulnerabilities

highCVE-2026-8644 CVE-2026-9311 CVE-2026-9319 CVE-2026-9330

An attacker can exploit multiple vulnerabilities in IBM WebSphere Application Server to bypass security measures and execute code.

CSIRTS triage

vendor: IBM product: WebSphere Application Server Authentication bypass Remote code execution

What: Multiple vulnerabilities in IBM WebSphere Application Server can be exploited to bypass security measures and execute code.
Who is affected: Deployments of IBM WebSphere Application Server are affected by these vulnerabilities.
Urgency: Remediation is high urgency due to the potential for security bypass and arbitrary code execution.
Action: Users should update to the latest version of IBM WebSphere Application Server to address these vulnerabilities.

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: high
Published: 2026-08-25
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-2026-1762

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-2026-86440.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-93110.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-93190.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-93300.52% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-8644	coverage & exploitation status	NVD · CVE.org
CVE-2026-9311	coverage & exploitation status	NVD · CVE.org
CVE-2026-9319	coverage & exploitation status	NVD · CVE.org
CVE-2026-9330	coverage & exploitation status	NVD · CVE.org

Recent advisories for IBM WebSphere Application Server

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[NEW] [medium] IBM WebSphere Application Server: Vulnerability allows execution of actionscert-bund · 2026-08-25
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