GitHub Advisoryadvisory · Hex
GHSA-rwcr-rpcc-3g9m elixir-nodejs has Cross-User Data Leakage or Information Disclosure due to Worker Protocol Race Condition
HIGH
Official page ↗
- Aliases
- CVE-2026-33872
- Ecosystem
- Hex
- Packages
- nodejs
- Severity
- High
- CVSS 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
- Weaknesses
- CWE-362
- Reviewed
- 2026-03-26
Affected packages
• Hex nodejs: < 3.1.4 → fixed in 3.1.4
Description
Impact
This vulnerability 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.
Patches
fixed in v3.1.4
Resources
https://github.com/revelrylabs/elixir-nodejs/issues/100
https://github.com/revelrylabs/elixir-nodejs/pull/105
Related
Alias · CVE (1)
- CVE-2026-33872 elixir-nodejs provides an Elixir API for calling Node.js functions. vulnerability
Weakness · CWE (1)
- CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization weakness
References
- https://github.com/revelrylabs/elixir-nodejs/security/advisories/GHSA-rwcr-rpcc-3g9m web
- https://nvd.nist.gov/vuln/detail/CVE-2026-33872 advisory
- https://github.com/revelrylabs/elixir-nodejs/issues/100 web
- https://github.com/revelrylabs/elixir-nodejs/pull/105 web
- https://github.com/revelrylabs/elixir-nodejs package
- https://github.com/revelrylabs/elixir-nodejs/releases/tag/v3.1.4 web