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2 actionable advisories, newest first. Withdrawn advisories and news are excluded. Coverage is partial.
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. Details The vulnerable function used String.prototype.replace() with a non-global regex to find and rewrite the first <svg tag's dimensions. Since the regex does not distinguish between <svg appearing inside non-element XML constructs and the actual SVG root element, a crafted input can cause the regex to match a decoy instead of the real element, leaving the actual SVG dimensions unclamped. In the Node.js rendering path, renderAsync from @resvg/resvg-js was called without a…
Recommended action: Upgrade to 9.4.2 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Impact The ensureSize() function in @dicebear/converter (versions < 9.4.0) read the width and height attributes from the input SVG to determine the output canvas size for rasterization (PNG, JPEG, WebP, AVIF). An attacker who can supply a crafted SVG with extremely large dimensions (e.g. width="999999999") could force the server to allocate excessive memory, leading to denial of service. This primarily affects server-side applications that pass untrusted or user-supplied SVGs to the converter's toPng(), toJpeg(), toWebp(), or toAvif() functions. Applications that only convert self-generated DiceBear avatars are not practically exploitable, but are still recommended to upgrade. Patches Fixed in version 9.4.0. The ensureSize() function no longer reads SVG attributes to determine output size. Instead, a new size option (default: 512, max: 2048) controls the output dimensions. Invalid values (NaN, negative, zero, Infinity) fall back to the default. Workarounds If upgrading is not…
Recommended action: Upgrade to 9.4.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.