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CVE-2021-32837

mechanize vulnerable to ReDoS

Published: Jan 17, 2023Updated: Dec 22, 2025 Sources: CVE List NVD GHSACWE-1333
7.5HIGH
NVD MITRE
EPSS Score
28.9%
Top 2.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-1333

Affected Products

mechanize project
oss-project
mechanizeLibrary
OSS Libraries / generic-library
PyPI
package-ecosystem
mechanize
OSS Libraries
python-mechanize
package-ecosystemaka mechanize
mechanizeLibrary
OSS Libraries / generic-library

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/python-mechanize/mechanize/blob/3acb1836f3fd8edc5a758a417dd46b53832ae3b5/mechanize/_urllib2_fork.py#L878-L879
github.com
https://github.com/python-mechanize/mechanize/commit/dd05334448e9f39814bab044d2eaa5ef69b410d6
github.com
https://github.com/python-mechanize/mechanize/releases/tag/v0.4.6
github.com
and 7 more references View all →

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