AIKIDO-2026-554194
libcurl is vulnerable to Information Disclosure
37
Low Risk
This Affects:
libcurlTL;DR
With libpsl, a Set-Cookie whose Domain is a public suffix equal to the origin host, such as Domain=co.uk from co.uk, is stored as a wildcard domain cookie instead of a host only cookie. Later requests to other names under that suffix, such as attacker.co.uk, include the cookie. The fix stores that cookie as host only.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you accept cookies with libpsl enabled.
Background info
libcurl is vulnerable to Information Disclosure in versions 7.46.0 - 8.21.0.
How to fix this
Upgrade the libcurl and/or the curl.curl library to the patch version.
Links
GitHub Release
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