CVE search · CVE-2026-1527
CVE-2026-1527
medium 4.6
ImpactWhen an application passes user-controlled input to the upgrade option of client.request(), an attacker can inject CRLF sequences (\r\n) to: * Inject arbitrary HTTP headers * Terminate the HTTP request prematurely and smuggle raw data to non-HTTP services (Redis, Memcached, Elasticsearch) The vulnerability exists because undici writes the upgrade value directly to the socket without validating for invalid header characters: // lib/dispatcher/client-h1.js:1121 if (upgrade) { header += `connection: upgrade\r\nupgrade: ${upgrade}\r\n` }
Details
- Status
- Analyzed
- Published
- Last changed
- Source
- ce714d77-add3-4f53-aff5-83d477b104bb
- Weakness
- CWE-93
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 3.1 | medium 4.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N |
ce714d77-add3-4f53-aff5-83d477b104bbSecondary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
- nodejs · undici
References
- https://cna.openjsf.org/security-advisories.htmlVendor Advisory
- https://github.com/nodejs/undici/security/advisories/GHSA-4992-7rv2-5pvqMitigationPatchVendor Advisory
- https://hackerone.com/reports/3487198Permissions Required