An issue in the getcolor function in utils.py of xhtml2pdf v0.2.13 allows attackers to cause a Regular expression Denial of Service (ReDOS) via supplying a crafted string.
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.
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.