CVE-2026-33752: curl_cffi: Redirect-based SSRF leads to internal network access in curl_cffi (with TLS impersonation bypass)
(updated )
curl_cffi 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 endpoints. In addition, curl_cffi’s TLS impersonation feature can make these requests appear as legitimate browser traffic, which may bypass certain network controls.
References
Code Behaviors & Features
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