# CVE-2026-58044 — nodejs node

> As of 2026-08-04, CVE-2026-58044 is a LOW-severity vulnerability in nodejs node, CVSS v3.1 3.7, EPSS 0.2% (17.7th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-58044, most recently “Node.js Patches 11 Security Flaws Across v22.23.2, v24.18.1, v26.5.1 (HTTP/2 DoS, Permission Model Bypass, TLS/mTLS Issues)”.

**Last updated:** 2026-08-04

## What is CVE-2026-58044?

A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild outbound headers from the visible `IncomingMessage` headers while piping the original body to a reused backend connection. Node.js can omit headers beyond `maxHeadersCount` / `maxHeaderPairs` from `req.headers`, `req.rawHeaders`, and `req.headersDistinct`, while still using those omitted headers internally for HTTP message framing. In particular, `Content-Length` can be hidden from userland while the request body is still delivered. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.

The record classifies CVE-2026-58044 under weakness class [CWE-444](https://intel.threadlinqs.com/cwe/CWE-444). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 67 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 3.7 — LOW (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 17.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-04

## Is CVE-2026-58044 being exploited?

It currently carries a trending score of 23 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [nodejs](https://intel.threadlinqs.com/vendors/nodejs): node

## How to fix CVE-2026-58044

No vendor patch reference has been recorded for CVE-2026-58044 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-58044

1 tracked threat in the Threadlinqs corpus references CVE-2026-58044, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Node.js Patches 11 Security Flaws Across v22.23.2, v24.18.1, v26.5.1 (HTTP/2 DoS, Permission Model Bypass, TLS/mTLS Issues)](https://intel.threadlinqs.com/threat/TL-2026-1807) — HIGH · 2026-08-01

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-10-10.

**Other references**

- [nodejs.org](https://nodejs.org/en/blog/vulnerability/july-2026-security-releases)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-58044
Full detection coverage and IOCs for threats exploiting CVE-2026-58044 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp