CVE-2026-33311Network attack vector

Cross-site scripting via unescaped SVG attributes

Published Mar 24, 2026 · Updated Mar 24, 2026

Cross-site scripting in DiceBear allows remote attackers to inject script through unvalidated avatar options in generated SVG output. The createAvatar path interpolates backgroundColor in @dicebear/core and fontFamily or textColor in @dicebear/initials into SVG attributes without XML entity encoding. Exposure requires untrusted input to bypass schema validation and the resulting SVG to be served inline or as image/svg+xml, where viewing it can execute script in a user's browser.

CVSS severity4.7
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in DiceBear allows remote attackers to inject script through unvalidated avatar options in generated SVG output. The createAvatar path interpolates backgroundColor in @dicebear/core and fontFamily or textColor in @dicebear/initials into SVG attributes without XML entity encoding. Exposure requires untrusted input to bypass schema validation and the resulting SVG to be served inline or as image/svg+xml, where viewing it can execute script in a user's browser.

The record

CVE
CVE-2026-33311
Published
Mar 24, 2026
Updated
Mar 24, 2026
Vendor
DiceBear
Product
DiceBear
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 5.0.0, < 5.4.4
  2. Affected versionversion=>= 6.0.0, < 6.1.4
  3. Affected versionversion=>= 7.0.0, < 7.1.4
  4. Affected versionversion=>= 8.0.0, < 8.0.3
  5. Affected versionversion=>= 9.0.0, < 9.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DiceBear · DiceBearversion=>= 5.0.0, < 5.4.4; version=>= 6.0.0, < 6.1.4; version=>= 7.0.0, < 7.1.4; version=>= 8.0.0, < 8.0.3; version=>= 9.0.0, < 9.4.1

Published CVSS scores

4.7GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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