CVE-2026-11856EPSS p51.0%
CVE-2026-11856CVE-2026-11856
haxx / curl
Description
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`.
Scoring
| CVSS | 9.8 () |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 0.69% probability of exploitation · percentile 51.0% · 2026-10-05T12:00:23Z |
| Last modified | 2026-09-15 |