---
id: CVE-2026-13772
title: >-
  IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.1.6 's Object Query Language
  engine resolves attacker-supplied class names via Class.forName() and invokes
  their constructors with no allow-list at three distinct sinks (SELECT NEW,
  enum li…
summary: >-
  IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.1.6 's Object Query Language
  engine resolves attacker-supplied class names via Class.forName() and invokes
  their constructors with no allow-list at three distinct sinks (SELECT NEW,
  enum li…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-470
vendor: ibm
product: websphere_extreme_scale
affected:
  - 'websphere_extreme_scale >= 8.6.1.0, <= 8.6.1.6'
published: '2026-06-30'
updated: '2026-07-03'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-13772'
references:
  - url: 'https://www.ibm.com/support/pages/node/7278593'
    label: psirt@us.ibm.com
tags:
  - nvd
epss: 0.0051
epssPercentile: 0.40916
ingestedAt: '2026-07-03T20:53:53.301Z'
---

## Overview

IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.1.6 's Object Query Language engine resolves attacker-supplied class names via Class.forName() and invokes their constructors with no allow-list at three distinct sinks (SELECT NEW, enum literals, and reflection-based comparators); an authenticated remote attacker who can influence an application-built OQL query string can execute arbitrary constructors on the WAS JVM, and a SELECT DISTINCT variant using planted grid values fires the same gadget post-readObject in a manner that survives JEP-290 serialization filters across grid node boundaries

## Affected

- `websphere_extreme_scale >= 8.6.1.0, <= 8.6.1.6`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.