CVE-2025-11919 Unprotected temporary directories in Wolfram Cloud may result in privilege escalation
An attacker with shared /tmp access can hijack JVM classpath to execute malicious code, leading to privilege escalation in Wolfram Cloud.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-11919?
CVE-2025-11919 is a critical vulnerability in Wolfram Research Inc. Cloud, published on 26 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2025-11919?
How do I fix CVE-2025-11919?
No fix has been published for CVE-2025-11919 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-11919 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-11919 exists.
Sources
Also known as GHSA-6f68-j9jr-9q2w.