CVE-2026-58045 Denial of service in node
A flaw in Node.js zlib APIs allows a spoofed TypedArray byteLength to crash the process, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-58045?
CVE-2026-58045 is a medium-severity denial of service vulnerability in nodejs node, published on 4 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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**.
Weakness: CWE-400
Which versions are affected by CVE-2026-58045?
2 open source packages ship an affected version, including node and node-min.
| Package | Affected | Fixed in |
|---|---|---|
node Bitnami | All versions | 22.23.2, 24.18.1, 26.5.1 |
node-min Bitnami | All versions | 22.23.2, 24.18.1, 26.5.1 |
How do I fix CVE-2026-58045?
Upgrade node to a fixed version for your release line: 22.23.2, 24.18.1 or 26.5.1.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-58045 being exploited?
There is no known exploitation of CVE-2026-58045 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as ALPINE-CVE-2026-58045, BELL-CVE-2026-58045, BIT-node-2026-58045, BIT-node-min-2026-58045, CLEANSTART-2026-FK24161, DEBIAN-CVE-2026-58045 and 11 more.