CVE-2026-33752: Lexiforest Curl Cffi

High severity, CVSS 8.6. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Lexiforest Curl Cffi: before 0.15.0 (fixed in 0.15.0); version 0.15.0 only

Published 2026-04-06. Last modified 2026-06-17.