AIKIDO-2026-768401
libcurl is vulnerable to Information Disclosure
55
Medium Risk
This Affects:
libcurlTL;DR
After a Digest authenticated transfer to one HTTP origin, reusing the same easy handle for a different origin still sends the Authorization header meant for the first origin. The second origin receives authenticated state for a single request and path, without the first origin's name or the raw credentials. A hostile second origin can replay that header against the first origin. The fix clears Digest state when the origin or the credentials change.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you reuse an easy handle for Digest authentication across origins.
Background info
libcurl is vulnerable to Information Disclosure in versions 7.10.6 - 8.20.0.
How to fix this
Upgrade the libcurl and/or the curl.curl library to the patch version.
Links
GitHub Release
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