Sanic is an opensource python web server/framework. Prior to version 24.12.1, and in version 25.12.0, the HTTP/1.1 response pipeline in sanic/response/types.py serializes response header names and values without rejecting carriage-return or line-feed characters. Applications that place attacker-controlled data in response.headers, file(..., filename=...), or cookie path and domain attributes can therefore emit injected headers and may split responses.
Depending on application and proxy behavior, this can enable session fixation through injected cookies, cache poisoning, or security-header corruption. This issue is fixed in versions 24.12.1 and 25.12.1.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 8
https://github.com/sanic-org/sanic/commit/47349d689d65fa1907977ac100e867894aeaf…
security-advisories@github.com
https://github.com/sanic-org/sanic/commit/9a95bb1c187558949606b915f5162c15f2db7…
security-advisories@github.com
https://github.com/sanic-org/sanic/commit/a332796506c7c588b6930b02a8886e43eb8ea…
security-advisories@github.com
https://github.com/sanic-org/sanic/pull/3164
security-advisories@github.com
https://github.com/sanic-org/sanic/pull/3165
security-advisories@github.com
https://github.com/sanic-org/sanic/releases/tag/v24.12.1
security-advisories@github.com
https://github.com/sanic-org/sanic/releases/tag/v25.12.1
security-advisories@github.com
https://github.com/sanic-org/sanic/security/advisories/GHSA-m64h-22vf-48wm
security-advisories@github.com