CVE-2026-33752
Because of this, an attacker-controlled URL can redirect requests to internal services such as cloud metadata endpoints.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- EPSS
- 0.46% probability · 39th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-918
- Affected
- lexiforest/curl cffi
- Source
- security-advisories@github.com
References
- https://github.com/lexiforest/curl_cffi/security/advisories/GHSA-qw2m-4pqf-rmppExploit, Vendor Advisory
- https://github.com/lexiforest/curl_cffi/security/advisories/GHSA-qw2m-4pqf-rmppExploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.