CVE-2026-30960 RSSN has Arbitrary Code Execution via Unvalidated JIT Instruction Generation in C-FFI Interface
Attackers can execute arbitrary code via malicious inputs in the JIT engine exposed through the C-FFI interface in the rssn library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-30960?
CVE-2026-30960 is a critical code injection vulnerability in Apich-Organization rssn, published on 10 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
rssn is a scientific computing library for Rust, combining a high-performance symbolic computation engine with numerical methods support and physics simulations functionalities. The vulnerability exists in the JIT (Just-In-Time) compilation engine, which is fully exposed via the CFFI (Foreign Function Interface). Due to Improper Input Validation and External Control of Code Generation, an attacker can supply malicious parameters or instruction sequences through the CFFI layer. Since the library often operates with elevated privileges or within high-performance computing contexts, this allows for Arbitrary Code Execution (ACE) at the privilege level of the host process.
Which versions are affected by CVE-2026-30960?
3 open source packages ship an affected version, including rssn.
| Package | Affected | Fixed in |
|---|---|---|
rssn crates.io | All versions | 0.2.9 |
rssn crates.io | All versions | 0.2.9 |
rssn crates.io | From 0.1.20 | 0.2.9 |
How do I fix CVE-2026-30960?
Upgrade rssn to 0.2.9 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-30960 being exploited?
There is no known exploitation of CVE-2026-30960 in the wild and no public exploit code.
Sources
Also known as GHSA-9c4h-pwmf-m6fj, RUSTSEC-2026-0038.