Vulnerability · Published Mar 27, 2026 · Assigned by GitHub_M
CVE-2026-33872elixir-nodejs has Cross-User Data Leakage or Information Disclosure due to Worker Protocol Race Condition
High 7.1
In plain English
A high-severity race condition in elixir-nodejs from revelrylabs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| revelrylabs | elixir-nodejs | < 3.1.4 |
Weakness: CWE-362 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/revelrylabs/elixir-nodejs/security/advisories/GHSA-rwcr-rpcc-3g9m x_refsource_CONFIRM
- https://github.com/revelrylabs/elixir-nodejs/issues/100 x_refsource_MISC
- https://github.com/revelrylabs/elixir-nodejs/pull/105 x_refsource_MISC
- https://github.com/revelrylabs/elixir-nodejs/releases/tag/v3.1.4 x_refsource_MISC