CVE-2021-32837

EUVD-2023-0144
mechanize, a library for automatically interacting with HTTP web servers, contains a regular expression that is vulnerable to regular expression denial of service (ReDoS) prior to version 0.4.6. If a web server responds in a malicious way, then mechanize could crash. Version 0.4.6 has a patch for the issue.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
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
GitHub_MCNA
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
Base Score
CVSS 3.x
EPSS Score
Percentile: 85%
Affected Products (NVD)
VendorProductVersion
mechanize_projectmechanize
𝑥
< 0.4.6
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
python-mechanize
bookworm
1:0.4.8+pypi-5
fixed
bullseye
no-dsa
sid
1:0.4.10+ds-1
fixed
trixie
1:0.4.10+ds-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
python-mechanize
bionic
needs-triage
focal
needs-triage
jammy
not-affected
kinetic
not-affected
lunar
not-affected
mantic
not-affected
noble
not-affected
trusty
ignored
xenial
needs-triage
Common Weakness Enumeration
References
https://github.com/python-mechanize/mechanize/blob/3acb1836f3fd8edc5a758a417dd46b53832ae3b5/mechanize/_urllib2_fork.py#L878-L879
https://github.com/python-mechanize/mechanize/commit/dd05334448e9f39814bab044d2eaa5ef69b410d6
https://github.com/python-mechanize/mechanize/releases/tag/v0.4.6
https://lists.debian.org/debian-lts-announce/2023/06/msg00022.html
https://securitylab.github.com/advisories/GHSL-2021-108-python-mechanize-mechanize/
https://github.com/python-mechanize/mechanize/blob/3acb1836f3fd8edc5a758a417dd46b53832ae3b5/mechanize/_urllib2_fork.py#L878-L879
https://github.com/python-mechanize/mechanize/commit/dd05334448e9f39814bab044d2eaa5ef69b410d6
https://github.com/python-mechanize/mechanize/releases/tag/v0.4.6
https://lists.debian.org/debian-lts-announce/2023/06/msg00022.html
https://lists.debian.org/debian-lts-announce/2025/12/msg00028.html
https://securitylab.github.com/advisories/GHSL-2021-108-python-mechanize-mechanize/