VDB
DEBIAN-CVE-2026-1527
DEBIAN-CVE-2026-1527
PUBLISHED
CVSS 4.599999904632568 MEDIUM
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` }
Risk Scores
CVSS v3.1
4.599999904632568
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | node-undici | 7.3.0+dfsg1, 7.18.2+dfsg+~cs3.2.0-1, 7.24.5+dfsg+~cs3.2.0-1 |
| Debian:14 | node-undici | 7.15.0+dfsg+~cs3.2.0-1, 7.15.0+dfsg+~cs3.2.0-3, 7.16.0+dfsg+~cs3.2.0-2 |
Timeline
- Mar 12, 2026 CVE Published
- Apr 28, 2026 CVE Updated