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CVE-2022-29361

Improper parsing of HTTP requests in Pallets Werkzeug v2.1.0 and below allows attackers to...

9.8 CriticalPublic exploitFix availableDisputed

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

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

8.07%Up 7.2 points since May 25, 2022
90%50%10%1%

What each source reports

NVD Score used 9.8

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

Record
CVE-2022-29361
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-444
Updated
2026-11-02
CVE List No score

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

Record
CVE-2022-29361
Updated
2026-11-02
EUVDEUVD-2022-0363 No score

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

Record
EUVD-2022-0363
Updated
2026-11-03
GitHub AdvisoriesGHSA-7wxw-4483-3m34 No score

Improper parsing of HTTP requests in Pallets Werkzeug v2.1.0 and below allows attackers to...

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.

Record
GHSA-7wxw-4483-3m34
Updated
2026-11-02
OSVALPINE-CVE-2022-29361 9.8

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

Record
ALPINE-CVE-2022-29361
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
OSVBELL-CVE-2022-29361 9.8

CVE-2022-29361 does not affect BellSoft software

Record
BELL-CVE-2022-29361
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSV No score

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

Record
CVE-2022-29361
Updated
2026-11-02
OSVopenSUSE-SU-2024:13098-1 No score

pgadmin4-7.4-1.1 on GA media

These are all security issues fixed in the pgadmin4-7.4-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:13098-1
Updated
2026-11-02
OSVPYSEC-2022-203 No score

** DISPUTED ** 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.

Record
PYSEC-2022-203
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
py3-werkzeug
Alpine:v3.17
 before 2.2.2-r0
2.2.2-r0
py3-werkzeug
Alpine:v3.18
 before 2.2.2-r0
2.2.2-r0
py3-werkzeug
Alpine:v3.19
 before 2.2.2-r0
2.2.2-r0
py3-werkzeug
Alpine:v3.20
 before 2.2.2-r0
2.2.2-r0
py3-werkzeug
Alpine:v3.21
 before 2.2.2-r0
2.2.2-r0
py3-werkzeug
Alpine:v3.22
 before 2.2.2-r0
2.2.2-r0
py3-werkzeug
Alpine:v3.23
 before 2.2.2-r0
2.2.2-r0
py3-werkzeug
Alpine:v3.24
 before 2.2.2-r0
2.2.2-r0
werkzeug
PyPI
 before 2.1.1, plus listed versions
0.10.100.10.10.10.20.10.3
Show 45 moreShow less
0.10.40.110.11.10.11.100.11.110.11.120.11.130.11.140.11.150.11.20.11.30.11.40.11.50.11.60.11.70.11.80.11.90.120.12.10.12.20.130.140.14.10.15.00.15.10.15.20.15.30.15.40.15.50.15.60.16.00.16.10.20.30.3.10.40.4.10.50.5.10.60.6.10.6.20.70.7.10.7.2
2.1.1
pgadmin4
openSUSE:Tumbleweed
 before 7.4-1.1
7.4-1.1

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
PoC in GitHubkevin-mizu/Werkzeug-CVE-2022-29361-PoC2023-04-09
PoC in GitHubl3ragio/CVE-2022-29361_Werkzeug_Client-Side-Desync-to-XSS2023-11-25

History

History
RecordedChangedSources
affectedOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-29361 is a critical vulnerability (CVSS 9.8) in Palletsprojects Werkzeug, published May 24, 2022. Its validity is disputed. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 8.07%, the 94th percentile. Fixed in py3-werkzeug 2.2.2-r0.

References

This page doesn't list everything

Left out here: 24 versions. The JSON record has them.

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