CVE-2021-32837
CVSS v3
7.5
HIGH
EPSS Score
28.9 %
exploit probability, as of 2026-10-05
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2023-01-17
Frequently asked questions
What is CVE-2021-32837?
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.
Is CVE-2021-32837 actively exploited?
Active exploitation of CVE-2021-32837 has not been confirmed. Its EPSS score was 28.9% on 2026-10-05, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-32837?
CVE-2021-32837 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-32837 affecting your environment?
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