CVE-2021-40900

7.5 highEPSS 1.1%

High (7.5) in regexfn project regexfn. EPSS 1.1% chance of exploitation in the next 30 days.

A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in regexfn v1.0.5 when validating crafted invalid emails.

Severity

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 1.1% chance of exploitation in the next 30 days; higher than 64% of CVEs (scores of 2026-10-31)
CWE: CWE-1333
Published: 2022-06-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19