CairoSVG is an SVG converter based on Cairo, a 2D graphics library. Prior to 2.9.1, rendering an attacker-controlled SVG with a path containing many segments can cause quadratic CPU consumption in cairosvg/path.py. The path tokenizer repeatedly slices and rescans the remaining path data, while draw_markers drains node.vertices with node.vertices.pop(0), causing repeated linear-time work. The svg2png, svg2pdf, and svg2ps APIs reach these operations during ordinary rendering, allowing a sub-megabyte SVG to consume substantial CPU and deny service to a rendering application. This issue is fixed in version 2.9.1.

Project Subscriptions

Vendors Products
Cairosvg Subscribe
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-c3jg-qh8m-j3h2 CairoSVG: Quadratic-time DoS parsing a crafted SVG <path>
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 08 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Kozea
Kozea cairosvg
Vendors & Products Kozea
Kozea cairosvg

Thu, 08 Oct 2026 18:15:00 +0000

Type Values Removed Values Added
Description CairoSVG is an SVG converter based on Cairo, a 2D graphics library. Prior to 2.9.1, rendering an attacker-controlled SVG with a path containing many segments can cause quadratic CPU consumption in cairosvg/path.py. The path tokenizer repeatedly slices and rescans the remaining path data, while draw_markers drains node.vertices with node.vertices.pop(0), causing repeated linear-time work. The svg2png, svg2pdf, and svg2ps APIs reach these operations during ordinary rendering, allowing a sub-megabyte SVG to consume substantial CPU and deny service to a rendering application. This issue is fixed in version 2.9.1.
Title CairoSVG: Quadratic-time DoS parsing a crafted SVG <path>
Weaknesses CWE-407
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-08T18:31:17.147Z

Reserved: 2026-10-07T21:07:54.987Z

Link: CVE-2026-107378

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-08T18:17:23.417

Modified: 2026-10-08T21:33:42.423

Link: CVE-2026-107378

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-08T21:15:13Z

Weaknesses