Description
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.
Published: 2026-03-24
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Immediate Patch
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-7j2x-32w6-p43p SVG Dimension Capping Bypass via XML Comment Injection in @dicebear/converter ensureSize()
History

Tue, 24 Mar 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Dicebear
Dicebear dicebear
CPEs cpe:2.3:a:dicebear:dicebear:*:*:*:*:*:*:*:*
Vendors & Products Dicebear
Dicebear dicebear

Tue, 24 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 24 Mar 2026 13:45:00 +0000

Type Values Removed Values Added
Description 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.
Title @dicebear/converter ensureSize() Vulnerable to SVG Dimension Capping Bypass via XML Comment Injection
Weaknesses CWE-185
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Dicebear Dicebear
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-24T15:11:51.489Z

Reserved: 2026-03-19T18:45:22.431Z

Link: CVE-2026-33418

cve-icon Vulnrichment

Updated: 2026-03-24T14:10:35.938Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-24T14:16:30.453

Modified: 2026-03-24T19:19:48.480

Link: CVE-2026-33418

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-25T20:50:13Z

Weaknesses