CVE-2020-14150: GNU Bison

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

GNU Bison before 3.5.4 allows attackers to cause a denial of service (application crash). NOTE: there is a risk only if Bison is used with untrusted input, and an observed bug happens to cause unsafe behavior with a specific compiler/architecture. The bug reports were intended to show that a crash may occur in Bison itself, not that a crash may occur in code that is generated by Bison.

Affected products

• GNU Bison: before 3.5.4 (fixed in 3.5.4)

Published 2020-06-15. Last modified 2026-06-17.