CVE-2026-8858

highcovered by 2 sourcesfirst seen 2026-07-02

An attacker can exploit multiple vulnerabilities in IBM WebSphere Application Server to execute arbitrary code, perform a Denial of Service attack, bypass security measures, disclose information, and escalate privileges.

CSIRTS triage

What: An attacker can exploit multiple vulnerabilities in IBM WebSphere Application Server to execute arbitrary code and perform a Denial of Service attack.
Who is affected: Deployments of IBM WebSphere Application Server are affected.
Urgency: Remediation is urgent due to the high severity and potential for arbitrary code execution.
Action: Update to the latest version of IBM WebSphere Application Server.

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

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Exploitation outlook

Low exploitation risk0.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.

Advisory coverage (2)

unknownMultiple vulnerabilities in IBM products (July 3, 2026)cert-fr-avis · 2026-07-03
high[UPDATE] [high] IBM WebSphere Application Server: Multiple vulnerabilitiescert-bund · 2026-07-02

External references

NVD record for CVE-2026-8858

CVE.org record

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