CVE-2018-21232: RE2C

Medium severity, CVSS 5.5. EPSS: 1.5% chance of exploitation in the next 30 days.

re2c before 2.0 has uncontrolled recursion that causes stack consumption in find_fixed_tags.

Affected products

• RE2C RE2C: before 2.0 (fixed in 2.0)

Published 2020-04-29. Last modified 2026-06-17.