Description
Improper parsing of HTTP requests in Pallets Werkzeug v2.1.0 and below allows attackers to perform HTTP Request Smuggling using a crafted HTTP request with multiple requests included inside the body. NOTE: the vendor's position is that this behavior can only occur in unsupported configurations involving development mode and an HTTP server from outside the Werkzeug project
Metrics
CVSS 3.1 9.8/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- https://github.com/pallets/werkzeug/commit/9a3a981d70d2e9ec3344b5192f86fcaf3210cd85Patch, Third Party Advisory
- https://github.com/pallets/werkzeug/issues/2420Issue Tracking, Third Party Advisory
- https://github.com/pallets/werkzeug/commit/9a3a981d70d2e9ec3344b5192f86fcaf3210cd85Patch, Third Party Advisory
- https://github.com/pallets/werkzeug/issues/2420Issue Tracking, Third Party Advisory
Timeline
- Published
- May 25, 2022
- Last modified
- Jun 17, 2026
- NVD status
- Modified