CVE-2026-11856 — cross-origin Digest auth state leak
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 se…
Published: 2026-07-03 · CVSS: 9.8 · CVSS 3.1
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`.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7