CVE-2022-40023

Published: Sep 7, 2022Modified: Dec 3, 2025

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

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.

Affected (2)

Products: Sqlalchemy: Mako · Debian: Debian Linux

1 product

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Sqlalchemy Mako	Before 1.2.2

Configuration B

1 vulnerable

Vulnerable Software	Affected Versions
Debian Debian Linux	Version 10.0

Related CWEs

CWE-1333

Inefficient Regular Expression Complexity

The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.

References (13)

https://github.com/sqlalchemy/mako/blob/c2f392e0be52dc67d1b9770ab8cce6a9c736d547/mako/ext/extract.py#L21

Source: cve@mitre.org

ExploitThird Party Advisory

https://github.com/sqlalchemy/mako/commit/925760291d6efec64fda6e9dd1fd9cfbd5be068c

Source: cve@mitre.org

Patch

https://github.com/sqlalchemy/mako/issues/366

Source: cve@mitre.org

Issue TrackingPatch

https://lists.debian.org/debian-lts-announce/2022/09/msg00026.html

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages/

Source: cve@mitre.org

ExploitThird Party Advisory

https://pyup.io/vulnerabilities/CVE-2022-40023/50870/

Source: cve@mitre.org

Third Party Advisory

https://github.com/sqlalchemy/mako/blob/c2f392e0be52dc67d1b9770ab8cce6a9c736d547/mako/ext/extract.py#L21