Vulnerability · Published Mar 18, 2026 · Assigned by GitHub_M
CVE-2026-29112@dicebear/converter vulnerable to ncontrolled memory allocation via crafted SVG dimensions
High 7.5
In plain English
A high-severity resource allocation without limits in dicebear from dicebear. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
DiceBear is an avatar library for designers and developers. Prior to version 9.4.0, the `ensureSize()` function in `@dicebear/converter` 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. This is 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. If upgrading is not immediately possible, validate and sanitize the `width` and `height` attributes of any untrusted SVG input before passing it to the converter.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @dicebear/converter | 9.4.0 | GHSA-v3r3-4qgc-vw66 |
Affected products (as reported)
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/dicebear/dicebear/security/advisories/GHSA-v3r3-4qgc-vw66 x_refsource_CONFIRM
- https://github.com/dicebear/dicebear/commit/42a59eac46a3c68598859e608ec45e578b27614a x_refsource_MISC
- https://github.com/dicebear/dicebear/releases/tag/v9.4.0 x_refsource_MISC