Resource exhaustion in Node.js Node

CVE-2026-58045

A flaw in Node.js allows a spoofed `TypedArray` `byteLength` to trigger a reachable assertion in the synchronous `node:zlib` APIs, causing the entire process to crash. All 11 synchronous zlib functions are affected.

Repeated exploitation of this condition can result in a denial of service.

This vulnerability affects Node.js **22.x**, **24.x**, and **26.x**.

Vulnerability class: DoS (Denial of Service)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS 0.002, 6.0th percentile (scored ); unchanged over 30 days. About EPSS.

Affected products

Weakness classification (CWE)

Public exploits and proof-of-concept code

5 public repositories with exploit or proof-of-concept code for this CVE:

  • CompleTech-Security/node-cve-2026-58045-check (last pushed 2026-10-26): Offline Node.js evidence checker for CVE-2026-58045: zlib synchronous API spoofed TypedArray crash. Single-file Python; JSON/CSV/HTML reports; no exploit payloads.
  • CompleteTech-Security/node-cve-2026-58045-check (last pushed 2026-10-26): Offline Node.js evidence checker for CVE-2026-58045: zlib synchronous API spoofed TypedArray crash. Single-file Python; JSON/CSV/HTML reports; no exploit payloads.
  • CompleTetech-Security/node-cve-2026-58045-check (last pushed 2026-10-26): Offline Node.js evidence checker for CVE-2026-58045: zlib synchronous API spoofed TypedArray crash. Single-file Python; JSON/CSV/HTML reports; no exploit payloads.
  • completetech-security/node-cve-2026-58045-check (last pushed 2026-10-24): Standalone defensive checker project for CVE-2026-58045: Node.js: zlib synchronous API spoofed TypedArray crash. One exploit per repository; implementation pending.
  • CompleteTech-LLC/node-cve-2026-58045-check (last pushed 2026-10-24): Standalone defensive checker project for CVE-2026-58045: Node.js: zlib synchronous API spoofed TypedArray crash. One exploit per repository; implementation pending.

References

This CVE has public exploit evidence. See the latest CVEs with public exploits.