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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 75%
VendorProductVersion
sqlalchemymako
𝑥
< 1.2.2
debiandebian_linux
10.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
mako
bullseye
no-dsa
bookworm
1.2.4+ds-1
fixed
sid
1.3.5-1.1
fixed
trixie
1.3.5-1.1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
mako
lunar
Fixed 1.2.4+ds-1
released
kinetic
Fixed 1.1.3+ds1-3ubuntu2.1
released
jammy
Fixed 1.1.3+ds1-2ubuntu0.1
released
focal
Fixed 1.1.0+ds1-1ubuntu2.1
released
bionic
Fixed 1.0.7+ds1-1ubuntu0.2
released
xenial
Fixed 1.0.3+ds1-1ubuntu1+esm1
released
trusty
ignored
Common Weakness Enumeration
References
https://github.com/sqlalchemy/mako/blob/c2f392e0be52dc67d1b9770ab8cce6a9c736d547/mako/ext/extract.py#L21
https://github.com/sqlalchemy/mako/commit/925760291d6efec64fda6e9dd1fd9cfbd5be068c
https://github.com/sqlalchemy/mako/issues/366
https://lists.debian.org/debian-lts-announce/2022/09/msg00026.html
https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages/
https://pyup.io/vulnerabilities/CVE-2022-40023/50870/
https://github.com/sqlalchemy/mako/blob/c2f392e0be52dc67d1b9770ab8cce6a9c736d547/mako/ext/extract.py#L21
https://github.com/sqlalchemy/mako/commit/925760291d6efec64fda6e9dd1fd9cfbd5be068c
https://github.com/sqlalchemy/mako/issues/366
https://lists.debian.org/debian-lts-announce/2022/09/msg00026.html
https://lists.debian.org/debian-lts-announce/2025/12/msg00004.html
https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages/
https://pyup.io/vulnerabilities/CVE-2022-40023/50870/