How serious is CVE-2026-3431?

This vulnerability has a CVSS score of 9.8 out of 10, classified as CRITICAL severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-3431?

Yes, proof-of-concept exploit code for CVE-2026-3431 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-3431?

CVE-2026-3431 affects sim sim. Check the full CVE details for specific version information.

How do I fix CVE-2026-3431?

To remediate CVE-2026-3431, check for security patches from sim. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-3431

Critical

|9.8

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

An attacker can exploit this vulnerability to connect to any accessible MongoDB database and perform unauthorized actions like reading, changing, or deleting data. This is possible because the affected version of SimStudio allows anyone to send connection requests without needing to log in or restrict which hosts can connect.

Technical Description

On SimStudio version below to 0.5.74, the MongoDB tool endpoints accept arbitrary connection parameters from the caller without authentication or host restrictions. An attacker can leverage these endpoints to connect to any reachable MongoDB instance and perform unauthorized operations including reading, modifying, and deleting data.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeUnchanged

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$13,000($5K-$15K)

Vendor Response

Grade APatched in 4 days

Quick Information

Published

Mar 2, 2026

about 1 month ago

Last Modified

Mar 6, 2026

about 1 month ago

Vendor

sim

Product

sim

Related Vulnerabilities

CVE-2026-3432Critical

An attacker can steal OAuth access tokens for any user by simply providing their user ID and a provider name, allowing them to access third-party services without needing to log in. This vulnerability affects versions of SimStudio below 0.5.74 and does not require any authentication, making it particularly dangerous.

CVE-2025-10097Medium

This vulnerability allows an attacker to inject malicious code into the SimStudioAI application, potentially compromising its functionality. The attack can be executed remotely, meaning the attacker doesn’t need physical access to the system, but it requires the attacker to manipulate specific input in the application.