What is CVE-2026-106443?

CVE-2026-106443 is a high-severity vulnerability in Kozea Weasyprint, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2026-10-06.

How severe is CVE-2026-106443?

High severity. CVSS v3 base score is 8.8 out of 10.

Improper input validation in Kozea Weasyprint

CVE-2026-106443

WeasyPrint helps web developers to create PDF documents. Prior to 70.0, the image-loading path in weasyprint/images.py passes fetched image bytes from HTML img URLs, CSS image values, SVG image references, and data URIs to Pillow's generic image dispatcher without excluding EPS or PostScript formats. On hosts with Ghostscript installed, Pillow EpsImagePlugin invokes the interpreter for attacker-controlled PostScript, which can produce interpreter-permitted effects and can lead to remote code execution when the installed Ghostscript version has a usable sandbox bypass. Hosts without Ghostscript do not reach this rasterization path. This issue is fixed in version 70.0.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-10-06 · last modified 2026-10-06.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Kozea Weasyprint — versions < 70.0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

Frequently asked questions

What is CVE-2026-106443?: CVE-2026-106443 is a high-severity vulnerability in Kozea Weasyprint, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2026-10-06.
How severe is CVE-2026-106443?: High severity. CVSS v3 base score is 8.8 out of 10.