[UPDATE] [high] IBM WebSphere Application Server and Application Server Liberty: Multiple vulnerabilities
An attacker can exploit multiple vulnerabilities in IBM WebSphere Application Server Liberty and IBM WebSphere Application Server to manipulate files, conduct a Cross-Site Scripting attack, execute arbitrary code, disclose information, and perform a Denial of Service attack.
CSIRTS triage
- What
- An attacker can exploit multiple vulnerabilities in IBM WebSphere Application Server and Application Server Liberty to manipulate files and execute arbitrary code.
- Who is affected
- Deployments of IBM WebSphere Application Server and Application Server Liberty are affected.
- Urgency
- Remediation is urgent due to the high severity and potential for arbitrary code execution.
- Action
- Apply the latest patches for IBM WebSphere Application Server and Application Server Liberty.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2050
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-2026-115410.42% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 34% of all scored CVEs.
- Low exploitation riskCVE-2026-115940.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 26% of all scored CVEs.
- Low exploitation riskCVE-2026-118060.47% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all scored CVEs.
- Low exploitation riskCVE-2026-424020.71% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 49% of all scored CVEs.
- Low exploitation riskCVE-2026-424030.76% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 51% of all scored CVEs.
- Low exploitation riskCVE-2026-424040.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-11383 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-11536 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-11541 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-11594 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-11707 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-11806 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-42402 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-42403 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-42404 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownMultiple vulnerabilities in IBM products (July 10, 2026)cert-fr-avis
- unknownMultiple vulnerabilities in IBM products (July 3, 2026)cert-fr-avis
- highCVE-2026-11541: IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 1…nvd
- highCVE-2026-11594: IBM WebSphere Application Server 9.0, and 8.5 is affected by a cross-site scripting vulnerabil…nvd
- highCVE-2026-11806: IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 is affected by an arbitra…nvd
- unknownMultiple vulnerabilities in IBM products (June 26, 2026)cert-fr-avis
- unknownIBM WebSphere Products Multiple Vulnerabilitieshkcert
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.
- high[UPDATE] [high] IBM WebSphere Application Server: Multiple vulnerabilitiescert-bund · 2026-07-09
- medium[NEW] [medium] IBM WebSphere Application Server Liberty: Vulnerability allows denial of servicecert-bund · 2026-07-08
- medium[NEW] [medium] IBM WebSphere Application Server: Vulnerability allows execution of actionscert-bund · 2026-07-08
- high[UPDATE] [high] IBM WebSphere Application Server: Multiple vulnerabilitiescert-bund · 2026-07-03
- medium[UPDATE] [medium] IBM WebSphere Application Server: Multiple vulnerabilitiescert-bund · 2026-07-03
- high[UPDATE] [high] IBM WebSphere Application Server: Multiple vulnerabilitiescert-bund · 2026-07-02
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