CairoSVG is an SVG converter based on Cairo, a 2D graphics library. Prior to Kozea/CairoSVG has exponential denial of service via recursive <use> element amplification in cairosvg/defs.py. This causes CPU exhaustion from a small input.
"https://github.com/pypa/advisory-database/blob/main/vulns/cairosvg/PYSEC-2026-2122.yaml"