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Inefficient Regular Expression Complexity

CVE-2021-40900

Medium
5/10

Summary

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

  • LOW
  • NETWORK
  • NONE
  • NONE
  • NONE
  • PARTIAL

CWE-1333 - Inefficient Regular Expression Complexity

The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.

References

Advisory Timeline

  • Published