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I. Basic Information for CVE-2026-31899
Vulnerability Information

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Vulnerability Title
CairoSVG vulnerable to Exponential DoS via recursive <use> element amplification
Source: NVD (National Vulnerability Database)
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的递归
Source: NVD (National Vulnerability Database)
Vulnerability Title
CairoSVG 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CairoSVG是Kozea开源的一个SVG格式转换工具。 CairoSVG存在安全漏洞,该漏洞源于递归<use>元素放大,可能导致指数级拒绝服务,造成CPU耗尽。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
KozeaCairoSVG < 2.9.0 -
II. Public POCs for CVE-2026-31899
#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
kimi-k2.5 · 7654 chars
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III. Intelligence Information for CVE-2026-31899
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IV. Related Vulnerabilities
V. Comments for CVE-2026-31899

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