CVE-2026-33418— DiceBear 安全漏洞

@dicebear/converter ensureSize() Vulnerable to SVG Dimension Capping Bypass via XML Comment Injection

DiceBear is an avatar library for designers and developers. Prior to version 9.4.2, the `ensureSize()` function in `@dicebear/converter` used a regex-based approach to rewrite SVG `width`/`height` attributes, capping them at 2048px to prevent denial of service. This size capping could be bypassed by crafting SVG input that causes the regex to match a non-functional occurrence of `<svg` before the actual SVG root element. When the SVG is subsequently rendered via `@resvg/resvg-js` on the Node.js code path, it renders at the attacker-specified dimensions, potentially causing out-of-memory crashes. In version 9.4.2, the regex-based approach has been replaced with XML-aware processing using `fast-xml-parser` to correctly identify and modify the SVG root element's attributes. Additionally, a `fitTo` constraint has been added to the `renderAsync` call as defense-in-depth, ensuring the rendered output is always bounded regardless of SVG content.

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

不正确的正则表达式

DiceBear 安全漏洞

DiceBear是DiceBear开源的一个随机头像生成库。 DiceBear 9.4.2之前版本存在安全漏洞，该漏洞源于ensureSize函数中基于正则表达式的SVG属性重写逻辑可被绕过，可能导致内存耗尽崩溃。

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