CVE-2026-22779

BlackSheep 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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

cpe:2.3:a:neoteroi:blacksheep:*:*:*:*:*:python:*:*

History

No history.

Information

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

Products Affected

neoteroi

blacksheep

CWE

CWE-113

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

NVD-CWE-Other

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