What is CVE-2026-30960?

CVE-2026-30960 is a critical-severity improper input validation vulnerability in rssn (rust), affecting versions < 0.2.9. It is fixed in 0.2.9. The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths.

Which versions of rssn are affected by CVE-2026-30960?

rssn (rust) versions < 0.2.9 is affected.

Is there a fix for CVE-2026-30960?

Yes. CVE-2026-30960 is fixed in 0.2.9. Upgrade to this version or later.

Is CVE-2026-30960 exploitable, and should I be worried?

Whether CVE-2026-30960 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2026-30960 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

CVE-2026-30960 in rssn

Q: Which versions of rssn are affected by CVE-2026-30960?

rssn (rust) versions < 0.2.9 is affected.

Q: Is there a fix for CVE-2026-30960?

Yes. CVE-2026-30960 is fixed in 0.2.9. Upgrade to this version or later.

Q: Is CVE-2026-30960 exploitable, and should I be worried?

Whether CVE-2026-30960 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2026-30960 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2026-30960?

Upgrade rssn to 0.2.9 or later.

Summary

RSSN has Arbitrary Code Execution via Unvalidated JIT Instruction Generation in C-FFI Interface

Who is Impacted?

Developers using the library as a dynamic linked library (.so, .dll, .dylib) in multi-language environments (e.g., Python, Node.js, C++).
Cloud Service Providers running the library in multi-tenant environments or automated model-training pipelines.
Users processing untrusted or third-party datasets/models that may trigger malicious JIT instruction generation.
Patches
Affected versions: < 0.2.8
Patched version: 0.2.9

Workarounds

If you cannot upgrade immediately, please consider the following mitigations:

Strict Sandboxing: Run the library within a restricted sandbox (e.g., WebAssembly, Docker with non-root user, or seccomp profiles) to limit system call access.
Principle of Least Privilege: Ensure the process calling the library does not have administrative or root privileges.
Input Filtering: If possible, implement an application-level validation layer to sanitize any data passed to the CFFI interfaces.
Disable JIT (if applicable): If your workload allows, use the interpreter-only mode (if provided by the library) to bypass the JIT engine entirely.
CVSS Score
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Base Score: 9.4 (Critical)

References

Apich Organization Security Team Homepage

Impact

Vulnerability Type:
Improper Control of Generation of Code ('Code Injection') (CWE-94) / Improper Check for Unusual or Exceptional Conditions (CWE-754) / Improper Input Validation (CWE-20) / Use of Low-Level Functionality (CWE-695) / Improper Privilege Management (CWE-269) / External Control of System or Configuration Setting (CWE-15).

Technical Details:
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.

The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths. Typical impact: varies by context: data corruption, logic bypass, or denial of service.

Affected versions

rssn (< 0.2.9)

Security releases

rssn → 0.2.9 (rust)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

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Remediation advice

Upgrade rssn to 0.2.9 or later to resolve this vulnerability.

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is CVE-2026-30960? CVE-2026-30960 is a critical-severity improper input validation vulnerability in rssn (rust), affecting versions < 0.2.9. It is fixed in 0.2.9. The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths.
Which versions of rssn are affected by CVE-2026-30960? rssn (rust) versions < 0.2.9 is affected.
Is there a fix for CVE-2026-30960? Yes. CVE-2026-30960 is fixed in 0.2.9. Upgrade to this version or later.
Is CVE-2026-30960 exploitable, and should I be worried? Whether CVE-2026-30960 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2026-30960 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2026-30960? Upgrade rssn to 0.2.9 or later.