critical9.8
CVE-2026-11856
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 …
Impact
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`.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Haxx | Curl | from 7.10.6 before 8.21.0 |