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CVE-2026-11536 IBM WebSphere Application Server

Affected softwareIBM WebSphere Application Server
Severity8.5 High CVSS 3.1
WeaknessDeserialization of untrusted data (CWE-502)
Published30 Jul 2026
Updated23 Oct 2026

Description

IBM WebSphere Application Server 9.0, and 8.5 is affected by a remote code execution vulnerability in the SOAP/JMX connector.

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 0.58% chance in 30 days

Waratek protection

Protected by Waratek

Waratek has a rule that blocks attacks on this vulnerability.

Decided by A vulnerability class already blocked by an ARMR security rule
Finding Protected by Waratek's ARMR deserialization security rule, which blocks this class of attack at the JVM level without a rule written for this CVE specifically. The CVE's weakness is CWE-502: Deserialization of Untrusted Data.

How to mitigate CVE-2026-11536

Apply the vendor's fix for IBM WebSphere Application Server. Until you can, Waratek RASP blocks exploitation with its deserialization and process rules. It runs inside the Java application, with no code changes.

Waratek RASP Runtime protection for Java applications

Affected software and releases

Products and versions

1 product, 2 version entries
SourceVendorProductSchemeAffected versions
nvd ibm websphere application server generic ≥ 8.5.0.0 and < 8.5.5.29 · ≥ 9.0.0.0 and < 9.0.5.28

References

URLTags
https://www.ibm.com/support/pages/node/7277544 Vendor Advisory

Timeline

Published2026-07-30By the CVE Program.
NVD record modified2026-10-23NVD's own last-modified date for this record.