CVE-2026-33752 — Redirect-based SSRF leading to internal network access in curl_cffi (with TLS impersonation bypass)
curl_cffi is the a Python binding for curl. Prior to 0.15.0, curl_cffi does not restrict requests to internal IP ranges, and follows redirects automatically via the underlying l…
Published: 2026-04-06 · CVSS: 8.6 · CVSS 3.1
curl_cffi is the a Python binding for curl. Prior to 0.15.0, 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. This vulnerability is fixed in 0.15.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7