revelrylabs elixir-nodejs up to 3.1.3 race condition

Summaryinfo

A vulnerability classified as problematic was found in revelrylabs elixir-nodejs up to 3.1.3. Affected is an unknown function. Such manipulation leads to race condition. This vulnerability is referenced as CVE-2026-33872. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in revelrylabs elixir-nodejs up to 3.1.3. Affected by this issue is an unknown function. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is confidentiality. CVE summarizes:

elixir-nodejs provides an Elixir API for calling Node.js functions. A vulnerability in versions prior to 3.1.4 results in Cross-User Data Leakage or Information Disclosure due to a race condition in the worker protocol. The lack of request-response correlation creates a "stale response" vulnerability. Because the worker does not verify which request a response belongs to, it may return the next available data in the buffer to an unrelated caller. In high-throughput environments where the library processes sensitive user data (e.g., PII, authentication tokens, or private records), a timeout or high concurrent load can cause Data A (belonging to User A) to be returned to User B. This may lead to unauthorized information disclosure that is difficult to trace, as the application may not throw an error but instead provide "valid-looking" yet entirely incorrect and private data to the wrong session. The issue is fixed in v3.1.4.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-33872 since 03/24/2026. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available.

Upgrading to version 3.1.4 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• revelrylabs

Name

• elixir-nodejs

Version

• 3.1.0
• 3.1.1
• 3.1.2
• 3.1.3

Website

• Product: https://github.com/revelrylabs/elixir-nodejs/

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