CVE-2022-40023

Sqlalchemy mako before 1.2.2 is vulnerable to Regular expression Denial of Service when using the Lexer class to parse. This also affects babelplugin and linguaplugin.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/sqlalchemy/mako/blob/c2f392e0be52dc67d1b9770ab8cce6a9c736d547/mako/ext/extract.py#L21	Exploit Third Party Advisory
https://github.com/sqlalchemy/mako/commit/925760291d6efec64fda6e9dd1fd9cfbd5be068c	Patch
https://github.com/sqlalchemy/mako/issues/366	Issue Tracking Patch
https://lists.debian.org/debian-lts-announce/2022/09/msg00026.html	Mailing List Third Party Advisory
https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages/	Exploit Third Party Advisory
https://pyup.io/vulnerabilities/CVE-2022-40023/50870/	Third Party Advisory
https://github.com/sqlalchemy/mako/blob/c2f392e0be52dc67d1b9770ab8cce6a9c736d547/mako/ext/extract.py#L21	Exploit Third Party Advisory
https://github.com/sqlalchemy/mako/commit/925760291d6efec64fda6e9dd1fd9cfbd5be068c	Patch
https://github.com/sqlalchemy/mako/issues/366	Issue Tracking Patch
https://lists.debian.org/debian-lts-announce/2022/09/msg00026.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/12/msg00004.html
https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages/	Exploit Third Party Advisory
https://pyup.io/vulnerabilities/CVE-2022-40023/50870/	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:sqlalchemy:mako:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

History

03 Dec 2025, 07:16

Type	Values Removed	Values Added
References		() https://lists.debian.org/debian-lts-announce/2025/12/msg00004.html -

Information

Published : 2022-09-07 13:15

Updated : 2025-12-03 07:16

NVD link : CVE-2022-40023

Mitre link : CVE-2022-40023

CVE.ORG link : CVE-2022-40023

JSON object : View

Products Affected

sqlalchemy

mako

debian

debian_linux

CWE

CWE-1333

Inefficient Regular Expression Complexity

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