CVE-2026-31899highCWE-674

CVE-2026-31899: high-severity vulnerability in Kozea CairoSVG

CairoSVG vulnerable to Exponential DoS via recursive <use> element amplification

Published · Updated

Follow this CVE+ Monitor CairoSVG+ Monitor cairosvg

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 0.6%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Kozea · CairoSVG
Related CVEs — Kozea CairoSVG

In the same product, most dangerous first.

CVE-2021-21236MEDIUMRegular Expression Denial of Service in CairoSVGEPSS 1.4%CVE-2023-27586CRITICALCairoSVG improperly processes SVG files loaded from external resourcesEPSS 0.7%CVE-2026-107378HIGHCairoSVG: Quadratic-time DoS parsing a crafted SVG <path>EPSS 0.4%