Threat database

CVE-2026-22779 is a medium severity vulnerability in the BlackSheep Python asynchronous web framework's HTTP Client prior to version 2.4.6. It involves improper neutralization of CRLF sequences in HTTP headers, allowing attackers to perform HTTP request/response splitting by injecting malicious headers or creating new HTTP requests. Exploitation requires developers to pass unsanitized user input directly into HTTP headers, and the server-side component is not affected. The vulnerability does not require authentication or user interaction and has a CVSS score of 6.3. No known exploits are currently reported in the wild. The issue is fixed in version 2.4.