Cyber Resilience

CVE-2021-32837

HighPublic PoC

Published: 17 January 2023

Published
17 January 2023
Modified
22 December 2025
KEV Added
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Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0194 83.8th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-32837 is a high-severity Inefficient Regular Expression Complexity (CWE-1333) vulnerability in Mechanize Project Mechanize. Its CVSS base score is 7.5 (High).

Operationally, ranked in the top 16.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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…

more

crash. Version 0.4.6 has a patch for the issue.

CWE(s)
CWE-1333

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

mechanize project
mechanize
≤ 0.4.6

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References