CVE-2026-58045
Description
A flaw was found in Node.js. A malicious actor could exploit this vulnerability by providing a specially crafted input to the synchronous node:zlib APIs. This could cause the Node.js process to crash, leading to a denial of service and making the application unavailable to users.
Statement
This flaw strictly impacts Availability with zero effect on Confidentiality or Integrity (C:N, I:N, A:H). Practical exploitation occurs when an application passes attacker-controlled typed array objects into synchronous node:zlib functions, triggering an internal assertion and crashing the Node.js process. Applications using asynchronous node:zlib routines or processing standard binary buffers are unaffected. Both Red Hat and CVEOrg scores align at 6.2 (Moderate) with a Local attack vector (AV:L), reflecting that an attacker must be able to inject malformed array structures directly into the application's synchronous data stream.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.2 | N/A | 6.2 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | None | N/A | None |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Crash, Exit, or Restart
An attacker that can trigger an assert statement can still lead to a denial of service if the relevant code can be triggered by an attacker, and if the scope of the assert() extends beyond the attacker's own session.
Frequently Asked Questions
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