Path Traversal in C4illin Convertx
CVE-2026-85618
ConvertX 0.17.0 contains an arbitrary file read vulnerability in the xelatex converter that allows authenticated users to read files by uploading LaTeX files with input directives. Attackers can upload .tex files containing \\input{path} or \\verbatiminput{path} directives to have the TeX engine read arbitrary files accessible to the server process and include them in downloadable PDF output.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/C4illin/ConvertX (product)
- github.com/C4illin/ConvertX/blob/v0.18.0/src/converters/xelatex.ts (technical-description)
- github.com/C4illin/ConvertX/issues/573 (issue-tracking)
- www.vulncheck.com/advisories/convertx-0.17.0-arbitrary-file-read-via-latex-inpu… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-85618?
- CVE-2026-85618 is a medium-severity vulnerability in C4illin Convertx, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-09-04.
- How severe is CVE-2026-85618?
- Medium severity. CVSS v3 base score is 6.5 out of 10.