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.
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History
Thu, 15 Jan 2026 08:15:00 +0000
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Neoteroi
Neoteroi blacksheep |
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Neoteroi
Neoteroi blacksheep |
Wed, 14 Jan 2026 21:15:00 +0000
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ssvc
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Wed, 14 Jan 2026 17:00:00 +0000
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| 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. | |
| Title | BlackSheep ClientSession is vulnerable to CRLF injection | |
| Weaknesses | CWE-113 | |
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cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-01-14T21:01:52.743Z
Reserved: 2026-01-09T18:27:19.388Z
Link: CVE-2026-22779
Updated: 2026-01-14T21:01:50.131Z
Status : Received
Published: 2026-01-14T17:16:09.150
Modified: 2026-01-14T17:16:09.150
Link: CVE-2026-22779
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