HTTP Request Smuggling (HRS)

2024-04-1610:41:43

Veracode Vulnerability Database

sca.analysiscenter.veracode.com

gunicorn

http request smuggling

vulnerability

transfer-encoding

security

endpoints

attackers

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

AI Score

6.9

Confidence

Low

EPSS

Percentile

9.0%

JSON

gunicorn is vulnerable to HTTP Request Smuggling (HRS). The vulnerability is due to improper processing of Transfer-Encoding headers by treating them as chunked regardless of the specified encoding , which allows attackers to bypass security restrictions and access restricted endpoints by crafting requests containing conflicting Transfer-Encoding headers