lackSheep is an asynchronous web framework to build event based web applications with Python. Prior to 2.4.6, the HTTP Client implementation in BlackSheep is vulnerable to CRLF injection. Missing headers validation makes it possible for an attacker to modify the HTTP requests (e.g. insert a new header) or even create a new HTTP request. Exploitation requires developers to pass unsanitized user input directly into headers.The server part is not affected because BlackSheep delegates to an underlying ASGI server handling of response headers. This vulnerability is fixed in 2.4.6.
| Link | Resource |
|---|---|
| https://github.com/Neoteroi/BlackSheep/commit/bd4ecb9542b5d52442276b5a6907931b90f38d12 | Patch |
| https://github.com/Neoteroi/BlackSheep/releases/tag/v2.4.6 | Release Notes |
| https://github.com/Neoteroi/BlackSheep/security/advisories/GHSA-6pw3-h7xf-x4gp | Third Party Advisory |
22 Jan 2026, 15:39
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Neoteroi
Neoteroi blacksheep |
|
| CWE | NVD-CWE-Other | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.3 |
| References | () https://github.com/Neoteroi/BlackSheep/commit/bd4ecb9542b5d52442276b5a6907931b90f38d12 - Patch | |
| References | () https://github.com/Neoteroi/BlackSheep/releases/tag/v2.4.6 - Release Notes | |
| References | () https://github.com/Neoteroi/BlackSheep/security/advisories/GHSA-6pw3-h7xf-x4gp - Third Party Advisory | |
| CPE | cpe:2.3:a:neoteroi:blacksheep:*:*:*:*:*:python:*:* |
14 Jan 2026, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Published : 2026-01-14 17:16
Updated : 2026-01-22 15:39
NVD link : CVE-2026-22779
Mitre link : CVE-2026-22779
CVE.ORG link : CVE-2026-22779
JSON object : View
Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
NVD-CWE-Other