---
id: CVE-2025-11919
title: >-
  The default JVM can access files and directories under `/tmp/` including the
  `$TemporaryDirectory` of other users on the same cloud instance
  (`/tmp/UserTemporaryFiles/`)
summary: >-
  The default JVM can access files and directories under `/tmp/` including the
  `$TemporaryDirectory` of other users on the same cloud instance
  (`/tmp/UserTemporaryFiles/`).  The `-init` file for the the JVM initialization
  exists in the vul…
severity: critical
cvss: 9.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N'
published: '2026-06-26'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T19:10:00.160'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-11919'
references:
  - url: >-
      https://github.com/PeterRoberge/vulnerability-wolfram-cloud-14.2/blob/main/disclosure.md
    label: cret@cert.org
  - url: 'https://www.kb.cert.org/vuls/id/553375'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/PeterRoberge/vulnerability-wolfram-cloud-14.2/blob/main/disclosure.md
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00407
epssPercentile: 0.32431
ingestedAt: '2026-09-29T19:44:04.093Z'
---

## Overview

The default JVM can access files and directories under `/tmp/` including the `$TemporaryDirectory` of other users on the same cloud instance (`/tmp/UserTemporaryFiles/`).  The `-init` file for the the JVM initialization exists in the vulnerable directory during the startup of the JVM.  An attacker with access to the shared `/tmp/` space can preemptively create or replace `.jar` files or directories (via the `-init` file) that the victim JVM will resolve first in its classpath.  By strategically placing a malicious version of a commonly used library (e.g., `commons-io`) in a location that is included in the classpath before the legitimate version, an attacker can cause the JVM to load the malicious class during startup, thereby executing the attacker's code.

## Remediation

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