BlackSheep ClientSession is vulnerable to CRLF injection_CVE-2026-22779

6.3 / 10

MEDIUM

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Description

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.

Basic Information

ID CVE-2026-22779

Source GitHub_M

Published Jan 14, 2026 at 16:49

Affected Product

Vendor Neoteroi

Product BlackSheep

Version < 2.4.6

Affected Versions Neoteroi BlackSheep < 2.4.6

CWE Classification

CWE-113

References

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    "published": "2026-01-14T16:49:34.202Z",
    "modified": "2026-01-14T16:49:34.202Z",
    "type": "cve",
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