markdown-it is a Markdown parser. Prior to version 1.3.2, special patterns with length greater than 50 thousand characterss could slow down the parser significantly. Users should upgrade to version 12.3.2 to receive a patch. There are no known workarounds aside from upgrading.
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Markdown-it | Markdown-it_project | * | 12.3.1 (including) |
| Node-markdown-it | Ubuntu | hirsute | * |
| Node-markdown-it | Ubuntu | impish | * |
| Node-markdown-it | Ubuntu | kinetic | * |
| Node-markdown-it | Ubuntu | lunar | * |
| Node-markdown-it | Ubuntu | mantic | * |
| Node-markdown-it | Ubuntu | trusty | * |
| Node-markdown-it | Ubuntu | xenial | * |
Attackers can create crafted inputs that
intentionally cause the regular expression to use
excessive backtracking in a way that causes the CPU
consumption to spike.