VULNERABILITY INTELLIGENCE

CVE-2025-55131

CVSS score7.1 HIGH
EPSS probability3.45%
CISA KEVNot currently listed
Published2026-01-20
Last modified2026-07-15
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

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.

Weakness classification

  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-120
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-497

Primary references