CURL-CVE-2026-11856

vendorUSosv

cross-origin Digest auth state leak

view advisory published 2026-06-24Licence: per source

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`.

01

describes (1)

Related CVEs.

IDseverity exploitable
CVE-2026-11856US—OT elevated—
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 secon…
scry

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