[CVE-2026-11856] Successfully using libcurl to do a transfer to a specific HTTP origin (`hostA`) with **Digest** auth…

Descripción técnica

Successfully using libcurl to do a transfer to a specific HTTP origin (`hostA`) with **Digest** authentication and then changing the origin to a different one (`hostB`) for a second transfer, reusing the same handle, makes libcurl wrongly pass on the `Authorization:` header field meant for `hostA`, to `hostB`.

Puntuación CVSS

Score: 9.8/10 — Severidad: CRITICAL — Estado NIST: Analyzed

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Productos afectados

Curl — Haxx

Debilidades (CWE)

CWE-294

Fuente oficial

Publicado en NIST NVD.