CVE-2026-33418

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/dicebear/dicebear/security/advisories/GHSA-7j2x-32w6-p43p	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:dicebear:dicebear:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-24 14:16

Updated : 2026-03-24 19:19

NVD link : CVE-2026-33418

Mitre link : CVE-2026-33418

CVE.ORG link : CVE-2026-33418

JSON object : View

Products Affected

dicebear

dicebear

CWE

CWE-185

Incorrect Regular Expression

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