CVE-2025-55131
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
20/01/2026
Last modified:
20/01/2026
Description
A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the `vm` module with the timeout option. Under specific timing conditions, buffers allocated with `Buffer.alloc` and other `TypedArray` instances like `Uint8Array` may contain leftover data from previous operations, allowing in-process secrets like tokens or passwords to leak or causing data corruption. While exploitation typically requires precise timing or in-process code execution, it can become remotely exploitable when untrusted input influences workload and timeouts, leading to potential confidentiality and integrity impact.
Impact
Base Score 3.x
7.10
Severity 3.x
HIGH