linktolocalpath in ebooks/conversion/plugins/htmlinput.py in calibre before 6.19.0 can, by default, add resources outside of the document root.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/46xxx/CVE-2023-46303.json",
"cna_assigner": "mitre"
}