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  5. CVE-2026-33752

CVE-2026-33752: curl_cffi: Redirect-based SSRF leads to internal network access in curl_cffi (with TLS impersonation bypass)

April 3, 2026 (updated April 6, 2026)

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

  • github.com/advisories/GHSA-qw2m-4pqf-rmpp
  • github.com/lexiforest/curl_cffi
  • github.com/lexiforest/curl_cffi/security/advisories/GHSA-qw2m-4pqf-rmpp
  • nvd.nist.gov/vuln/detail/CVE-2026-33752

Code Behaviors & Features

Detect and mitigate CVE-2026-33752 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →

Affected versions

All versions before 0.15.0

Fixed versions

  • 0.15.0

Solution

Upgrade to version 0.15.0 or above.

Impact 8.6 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Learn more about CVSS

Weakness

  • CWE-918: Server-Side Request Forgery (SSRF)

Source file

pypi/curl-cffi/CVE-2026-33752.yml

Spotted a mistake? Edit the file on GitLab.

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