CVE-2026-31899 — HIGH (7.5)

Vulnerability Description

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 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Courtbouillon	Cairosvg	< 2.9.0

Related Weaknesses (CWE)

CWE-674

References

https://github.com/Kozea/CairoSVG/commit/6dde8685ed3f19837767bce7a13a5491e3d0e0bPatch
https://github.com/Kozea/CairoSVG/security/advisories/GHSA-f38f-5xpm-9r7cExploitMitigationVendor Advisory

FAQ

What is CVE-2026-31899?

CVE-2026-31899 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...

How severe is CVE-2026-31899?

CVE-2026-31899 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-31899?

Check the references section above for vendor advisories and patch information. Affected products include: Courtbouillon Cairosvg.