| ID |
CVE-2026-1527
|
| Sažetak |
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`
} |
| Reference |
|
| CVSS |
| Base: | 4.6 |
| Impact: | 2.5 |
| Exploitability: | 2.1 |
|
| Pristup |
| Vektor | Složenost | Autentikacija |
| NETWORK |
LOW |
LOW |
|
| Impact |
| Povjerljivost | Cjelovitost | Dostupnost |
| LOW |
LOW |
NONE |
|
| CVSS vektor |
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N |
| Zadnje važnije ažuriranje |
13-03-2026 - 20:06 |
| Objavljeno |
12-03-2026 - 21:16 |
