CVE-2026-33752 Redirect-based SSRF leading to internal network access in curl_cffi (with TLS impersonation bypass)

curlcffi is the a Python binding for curl. Prior to 0.15.0, curlcffi does not restrict requests to internal IP ranges, and follows redirects automatically via the underlying libcurl. Because of this, an attacker-controlled URL can redirect requests to internal services such as cloud metadata...

GHSA-W235-7P84-XX57 Tornado has a CRLF injection in CurlAsyncHTTPClient headers

Summary Tornado’s curlhttpclient.CurlAsyncHTTPClient class is vulnerable to CRLF carriage return/line feed injection in the request headers. Details When an HTTP request is sent using CurlAsyncHTTPClient, Tornado does not reject carriage return \r or line feed \n characters in the request headers...

inappropriate GSSAPI delegation

When doing GSSAPI authentication, libcurl unconditionally performs credential delegation. This hands the server a copy of the client's security credentials, allowing the server to impersonate the client to any other using the same GSSAPI mechanism. This is obviously a sensitive operation, which...