What’s Vulnerable › Vulnerabilities

CVE-2021-3820: Inefficient Regular Expression Complexity in pksunkara/inflect

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-27 · updated 2026-06-17
• Weakness: CWE-1333

Description

inflect is vulnerable to Inefficient Regular Expression Complexity

Affected products

• pksunkara/inflect: before 0.3.7 — fixed in 0.3.7
• Npm I: before 0.3.7 — fixed in 0.3.7

How to fix

Upgrade to a fixed version: pksunkara/inflect 0.3.7; Npm I 0.3.7. Check the vendor advisory for mitigations.

References

• https://github.com/pksunkara/inflect/commit/a9a0a8e9561c3487854c7cae42565d9652ec858b
• https://huntr.dev/bounties/4612b31a-072b-4f61-a916-c7e4cbc2042a
• https://github.com/pksunkara/inflect/commit/a9a0a8e9561c3487854c7cae42565d9652ec858b
• https://huntr.dev/bounties/4612b31a-072b-4f61-a916-c7e4cbc2042a

Get alerted when CVE-2021-3820 or the next vulnerability affects your stack