Description
Impact: A bad regular expression is generated any time you have multiple sequential optional groups (curly brace syntax), such as `{a}{b}{c}:z`. The generated regex grows exponentially with the number of groups, causing denial of service. Patches: Fixed in version 8.4.0. Workarounds: Limit the number of sequential optional groups in route patterns. Avoid passing user-controlled input as route patterns.
CVSS 7.5EPSS 0.791%Risk 0.8
View source- Published
- 2026-03-26 19:17:08
- Affected versions
- <8.4.0
- Type
- Other
- Last modified
- 2026-08-05 13:23:26
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H