CVE-2026-108939 EricLBuehler mistral.rs media_source.rs is_global_ip server-side request forgery

Medium 6.9 Published Updated

Remote attackers can exploit a flaw in mistral.rs to perform server-side request forgery, potentially accessing internal resources.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
None listed

What is CVE-2026-108939?

CVE-2026-108939 is a medium-severity server-side request forgery vulnerability in EricLBuehler mistral.rs, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability has been found in EricLBuehler mistral.rs up to 0.9.3. Impacted is the function is_global_ip of the file mistralrs-server-core/src/media_source.rs. Such manipulation of the argument ip leads to server-side request forgery. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 0.9.4 is recommended to address this issue. The name of the patch is cfb8c6a0c42361dc4579a9110b54d339c255b9fd. The affected component should be upgraded.

Weakness: CWE-918

Which versions are affected by CVE-2026-108939?

How do I fix CVE-2026-108939?

No fix has been published for CVE-2026-108939 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2026-108939 being exploited?

There is no known exploitation of CVE-2026-108939 in the wild and no public exploit code.

Sources

Also known as GHSA-qjg5-pf8f-r356.

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