# CVE-2026-11708: IBM WebSphere Application Server XSS in administrative console help system

Source: https://junglewise.ai/threats/cve-2026-11708-ibm-websphere-application-server-xss-in-administrative-console  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-30. Updated: 2026-06-30  
License: CC BY 4.0 with a link back

CVE-2026-11708 · Severity: critical · CVSS 9.3 · Published 2026-06-30

IBM WebSphere Application Server, a platform used to build and run enterprise applications, is affected by a security flaw in its administrative console's help system. An attacker could use this vulnerability to execute malicious scripts in a user's browser, potentially leading to unauthorized actions or the theft of sensitive administrative session information. Organizations should apply the available interim fixes or upgrade to the latest fix pack to protect their management interfaces.

Technologies: [IBM WebSphere Application Server](https://junglewise.ai/threats/technologies/websphere-application-server). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-11708 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-11708 being exploited in the wild.

**How severe is CVE-2026-11708?** Critical severity, with a CVSS score of 9.3, published 30 June 2026.

**Which products and versions are affected?** IBM WebSphere Application Server 9.0.0.0 through 9.0.5.28, 8.5.0.0 through 8.5.5.30.

**Is there a fix for CVE-2026-11708?** A patch was published on 2026-06-30. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-11708 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-11708?** Check whether you run IBM WebSphere Application Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A cross-site scripting (XSS) vulnerability exists in the integrated help system of the IBM WebSphere Application Server administrative console. The flaw is caused by improper neutralization of user-supplied input during web page generation (CWE-79). An unauthenticated remote attacker can exploit this by tricking a user into clicking a specially crafted link, allowing the execution of arbitrary JavaScript in the context of the victim's browser session. This can lead to session hijacking or unauthorized administrative actions. The vulnerability affects versions 9.0 (up to 9.0.5.28) and 8.5 (up to 8.5.5.30), and can be remediated by applying interim fix PH71756 or upgrading to fix packs 9.0.5.29 / 8.5.5.31.

## Affected products

- IBM WebSphere Application Server 9.0.0.0 through 9.0.5.28, 8.5.0.0 through 8.5.5.30

## Timeline

- 2026-06-30: disclosed
- 2026-06-30: advisory
- 2026-06-30: patched

## References

- [https://www.ibm.com/support/pages/node/7278590](https://www.ibm.com/support/pages/node/7278590)

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