How severe is CVE-2026-11806?

CVE-2026-11806 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-11806 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-11806?

CVE-2026-11806 affects Ibm Websphere Application Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-11806?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-11806 published?

CVE-2026-11806 was published on 2026-06-30 and last updated on 2026-07-02.

CVE-2026-11806

CVE-2026-11806 is a high-severity vulnerability in Ibm Websphere Application Server with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-444.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-444
Affected product: Ibm Websphere Application Server
Published: 2026-06-30
Last modified: 2026-07-02

Description

IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 is affected by an arbitrary file read vulnerability with the restConnector-2.0 feature enabled.

Frequently asked questions

What is CVE-2026-11806?: IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 is affected by an arbitrary file read vulnerability with the restConnector-2.0 feature enabled.
How severe is CVE-2026-11806?: CVE-2026-11806 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-11806 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-11806?: CVE-2026-11806 affects Ibm Websphere Application Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-11806?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-11806 published?: CVE-2026-11806 was published on 2026-06-30 and last updated on 2026-07-02.

References

https://www.ibm.com/support/pages/node/7277536

Affected products (1)

cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:*

More vulnerabilities in Ibm Websphere Application Server

CVE-2015-1920 — Critical (CVSS 10.0): IBM WebSphere Application Server (WAS) 6.1 through 6.1.0.47, 7.0 before 7.0.0.39, 8.0 before 8.0.0.11, and 8.5 before…
CVE-2013-1777 — Critical (CVSS 10.0): The JMX Remoting functionality in Apache Geronimo 3.x before 3.0.1, as used in IBM WebSphere Application Server (WAS)…
CVE-2013-0462 — Critical (CVSS 10.0): Unspecified vulnerability in IBM WebSphere Application Server (WAS) 6.1, 7.0 before 7.0.0.27, 8.0, and 8.5 has unknown…
CVE-2012-5955 — Critical (CVSS 10.0): Unspecified vulnerability in the IBM HTTP Server component 5.3 in IBM WebSphere Application Server (WAS) for z/OS…
CVE-2011-1377 — Critical (CVSS 10.0): The Web Services Security component in the Web Services Feature Pack before 6.1.0.41 for IBM WebSphere Application…
CVE-2010-3186 — Critical (CVSS 10.0): IBM WebSphere Application Server (WAS) 7.x before 7.0.0.13, and WebSphere Application Server Feature Pack for Web…

All CVEs affecting Ibm Websphere Application Server →

Other CWE-444 (HTTP Request/Response Smuggling) vulnerabilities

CVE-2025-1867 — Critical (CVSS 10.0): Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in ithewei libhv allows…
CVE-2022-22536 — Critical (CVSS 10.0): SAP NetWeaver Application Server ABAP, SAP NetWeaver Application Server Java, ABAP Platform, SAP Content Server 7.53…
CVE-2018-3907 — Critical (CVSS 10.0): An exploitable vulnerability exists in the REST parser of video-core's HTTP server of the Samsung SmartThings Hub…
CVE-2025-55315 — Critical (CVSS 9.9): Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized…
CVE-2020-15049 — Critical (CVSS 9.9): An issue was discovered in http/ContentLengthInterpreter.cc in Squid before 4.12 and 5.x before 5.0.3. A Request…
CVE-2026-13763 — Critical (CVSS 9.8): Inconsistent interpretation of HTTP/2 requests in AWS Application Load Balancer with AWS WAF enabled might allow remote…

Browse all CWE-444 (HTTP Request/Response Smuggling) vulnerabilities →