Nodejs: A flaw in Node.js allows a spoofed TypedArray byteLength to trigger a reachable assertion in the synchronous node:zlib APIs, causing the entire… (CVE-2026-58045)
Description
A vulnerability in Node.js allows a spoofed TypedArray byteLength to trigger an assertion failure in synchronous node:zlib APIs, causing the process to crash. This affects all 11 synchronous zlib functions and can lead to denial of service through repeated exploitation. The flaw impacts Node.js versions 22.x, 24.x, and 26.x.
CVSS v3.0
Score 6.2medium
Affected software
pkg:deb/ubuntu/nodejs?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/nodejs?arch=source&distro=esm-apps/xenialpkg:deb/ubuntu/nodejs?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/nodejs?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/nodejs?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/nodejs?arch=source&distro=noblepkg:deb/ubuntu/nodejs?arch=source&distro=stonkingpkg:deb/ubuntu/nodejs?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Node.js involves a spoofed TypedArray byteLength that triggers a reachable assertion in the synchronous node:zlib APIs. This assertion failure causes the entire Node.js process to crash. All 11 synchronous zlib functions are affected by this flaw. The vulnerability affects Node.js versions 22.x, 24.x, and 26.x. The CVSS 3.0 base score is 6.2, indicating a medium severity denial of service impact. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild. The vulnerability does not affect cloud services and no patch or remediation information is provided in the input data.
Potential Impact
Exploitation of this vulnerability results in a denial of service by crashing the Node.js process. There is no impact on confidentiality or integrity. Repeated exploitation can cause persistent denial of service conditions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided in the available data. Users should monitor vendor advisories for updates and apply patches once available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-58045
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.0
- State
- PUBLISHED
Threat ID: 6ad3f5de2cdf04f656663470
Added to database: 10/17/2026, 22:25:34 UTC
Last enriched: 10/18/2026, 00:32:37 UTC
Last updated: 10/18/2026, 00:32:37 UTC
Views: 3
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