CVE ID :CVE-2026-1527 Published : March 12, 2026, 9:16 p.m. | 49 minutes ago Description :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` } Severity: 4.6 | MEDIUM Visit the link for more details, such as CVSS details, affected products, timeline, and more...