CVE-2026-33752
Redirect-based SSRF leading to internal network access in curl_cffi (with TLS impersonation bypass)
HIGH 8.6EPSS 0.4%
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
- lexiforest · curl_cffi
- CVSS v3.1 GITHUB
- 8.6 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - EPSS
- 0.45% chance of exploitation in the next 30 days, 37th percentile
- Published
- 2026-04-06
Proof-of-concept exploits (2)
- advisories/GHSA-qw2m-4pqf-rmpp
- redyank/CVE-2026-337520★ · 2026-04-04