CRLF injection in request headers
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat.
Summary
undici is an HTTP/1.1 client, written from scratch for Node.js. It is possible to inject CRLF sequences into request headers in undici in versions less than 5.7.1. A fix was released in version 5.8.0. Sanitizing all HTTP headers from untrusted sources to eliminate `\r\n` is a workaround for this issue.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| NodeJS | undici | < v5.7.1, >= v5.8.0 | — | No fix listed | CNA |
| — | undici (npm) | before 5.8.0 | 5.8.0 | Patch available | GHSA-3cvr-822r-rqcc |
- undici VendorNodeJS Affected < v5.7.1, >= v5.8.0 Fixed in — No fix listed CNA
- undici (npm) Vendor— Affected before 5.8.0 Fixed in 5.8.0 Patch available GHSA-3cvr-822r-rqcc
Remediation
- Fix · GHSA-3cvr-822r-rqcc undici (npm) Fixed in 5.8.0 Advisory →
Red Hat 1 advisory
- RHSA-2022:6696 Released 2022-09-26 · Red Hat rating CriticalRed Hat Advanced Cluster Management 2.4.6 security update and bug fixes
- Red Hat Advanced Cluster Management for Kubernetes 2.4 for RHEL 8 rhacm2/acm-grafana-rhel8, rhacm2/acm-must-gather-rhel8, rhacm2/acm-operator-bundle +47
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix yet |
| Red Hat OpenShift Dev Spaces | Affected | No fix yet |
Timeline
- 2026-10-02 Threatist record created from CVE-2022-31150
- 2026-10-03 Alias added: GHSA-3cvr-822r-rqcc
References
Exploit 2
Advisory 3
More NodeJS Undici vulnerabilities
- TI-2026-01215 undici is vulnerable to Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') CVSS 3.1CRITICAL 9.8
- TI-2022-16376 `undici.request` vulnerable to SSRF using absolute URL on `pathname` CVSS 3.1CRITICAL 9.8
- TI-2023-09734 CRLF Injection in Nodejs ‘undici’ via host CVSS 3.1MEDIUM 6.5
- TI-2022-16375 CRLF Injection in Nodejs ‘undici’ via Content-Type CVSS 3.1MEDIUM 5.3
- TI-2022-13194 Uncleared cookies on cross-host/cross-origin redirect in undici CVSS 3.1MEDIUM 6.5
- TI-2024-20007 Undici's fetch with integrity option is too lax when algorithm is specified but hash value is in incorrect CVSS 3.1LOW 3.5
Sources
- CVE-2022-31150 · CVE Program
- CVE-2022-31150 · NVD
- FIRST EPSS
- GHSA-3cvr-822r-rqcc · GitHub Advisory Database · CC BY 4.0
- CVE-2022-31150 · 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