A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Partial Red Hat: 1 fixed, 1 without a fix
Attack profile from CVSS 3.0 · CNA. Fix status from CNA and Red Hat.
Summary
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**.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
Red Hat 3 advisories
- RHSA-2026:54438 Released 2026-08-12 · Red Hat rating ImportantRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images nodejs24-1:24.18.1-0.2.2.hum1@aarch64, nodejs24-1:24.18.1-0.2.2.hum1@src, nodejs24-1:24.18.1-0.2.2.hum1@x86_64 +14
- RHSA-2026:54436 Released 2026-08-12 · Red Hat rating ImportantRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images nodejs22-1:22.23.2-2.3.2.hum1@aarch64, nodejs22-1:22.23.2-2.3.2.hum1@src, nodejs22-1:22.23.2-2.3.2.hum1@x86_64 +16
- RHSA-2026:54389 Released 2026-08-12 · Red Hat rating ImportantRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images nodejs26-1:26.7.0-1.5.2.hum1@aarch64, nodejs26-1:26.7.0-1.5.2.hum1@src, nodejs26-1:26.7.0-1.5.2.hum1@x86_64 +16
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Hardened Images | Affected | No fix planned: Will not fix |
| Red Hat Hardened Images | Fixed | RHSA-2026:54389, RHSA-2026:54436, RHSA-2026:54438 |
Not affected: 1 product
- Red Hat Hardened Images
Timeline
- 2026-10-02 Threatist record created from CVE-2026-48932
- 2026-10-03 Alias added: GHSA-44cw-v76j-7fvv
- 2026-10-20 Fix available: RHSA-2026:54438 · Red Hat
- 2026-10-20 Fix available: RHSA-2026:54389 · Red Hat
- 2026-10-20 Fix available: RHSA-2026:54436 · Red Hat
- 2026-10-20 Fix available: Red Hat Hardened Images · Red Hat
- 2026-10-20 CVSS score added · Red Hat
References
More NodeJS vulnerabilities
- TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
- TI-2024-18584 Race condition in NodeJS Node CVSS 3.0HIGH 8.2
- TI-2016-01993 The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other… CVSS 3.1HIGH 7.5
- TI-2024-03325 Command injection vulnerability in programing languages on Microsoft Windows operating system. CVSS 3.1CRITICAL 9.8
- TI-2022-03472 X.509 Email Address Variable Length Buffer Overflow CVSS 3.1HIGH 7.5
Sources
- CVE-2026-48932 · CVE Program
- CVE-2026-48932 · NVD
- FIRST EPSS
- GHSA-44cw-v76j-7fvv · GitHub Advisory Database · CC BY 4.0
- CVE-2026-48932 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences