Oniguruma before 6.9.3 allows Stack Exhaustion in regcomp.c because of recursion in regparse.c.
https://github.com/kkos/oniguruma/commit/4097828d7cc87589864fecf452f2cd46c5f37180
https://github.com/kkos/oniguruma/compare/v6.9.2...v6.9.3
https://github.com/kkos/oniguruma/issues/147
https://lists.debian.org/debian-lts-announce/2019/09/msg00010.html
Source: MITRE
Published: 2019-09-09
Updated: 2020-08-24
Type: CWE-674
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 3.9
Severity: HIGH