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CVE-2026-33311

MEDIUM CVSS 3.1: 4.7 EPSS 0.03%
Updated Mar 24, 2026
Dicebear
Parameter Value
CVSS 4.7 (MEDIUM)
Affected Versions 5.0.0 — 9.4.1
Fixed In 5.4.4
Type CWE-79 (Cross-Site Scripting (XSS))
Vendor Dicebear
Public PoC No

DiceBear is an avatar library for designers and developers. Starting in version 5.0.0 and prior to versions 5.4.4, 6.1.4, 7.1.4, 8.0.3, and 9.4.1, SVG attribute values derived from user-supplied options (`backgroundColor`, `fontFamily`, `textColor`) were not XML-escaped before interpolation into SVG output. This could allow Cross-Site Scripting (XSS) when applications pass untrusted input to `createAvatar()` and serve the resulting SVG inline or with `Content-Type: image/svg+xml`.

Starting in versions 5.4.4, 6.1.4, 7.1.4, 8.0.3, and 9.4.1, all affected SVG attribute values are properly escaped using XML entity encoding. Users should upgrade to the listed patched versions. Some mitigating factors limit vulnerability.

Applications that validate input against the library's JSON Schema before passing it to `createAvatar()` are not affected. The DiceBear CLI validates input via AJV and was not vulnerable. Exploitation requires that an application passes untrusted, unvalidated external input directly as option values.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v3.1

Vulnerable Products 5

Configuration From (including) Up to (excluding)
Dicebear Dicebear
cpe:2.3:a:dicebear:dicebear:*:*:*:*:*:*:*:*
5.0.0 5.4.4
Dicebear Dicebear
cpe:2.3:a:dicebear:dicebear:*:*:*:*:*:*:*:*
6.0.0 6.1.4
Dicebear Dicebear
cpe:2.3:a:dicebear:dicebear:*:*:*:*:*:*:*:*
7.0.0 7.1.4
Dicebear Dicebear
cpe:2.3:a:dicebear:dicebear:*:*:*:*:*:*:*:*
8.0.0 8.0.3
Dicebear Dicebear
cpe:2.3:a:dicebear:dicebear:*:*:*:*:*:*:*:*
9.0.0 9.4.1