CVE-2026-44311Public exploitNetwork attack vector

Cross-site scripting via unescaped gradient color stops

Published Jun 22, 2026 · Updated Jun 22, 2026

Cross-site scripting in Fabric.js before 7.4.0 allows remote attackers to execute JavaScript through crafted gradient colors in exported SVG. The toSVG() path inserts each fabric.Gradient colorStops color value into an SVG stop-color attribute without escaping quotes or angle brackets, allowing the value to terminate the attribute and inject markup. Exploitation requires an application to accept attacker-controlled gradient definitions, export them with toSVG(), and insert the generated SVG into a victim's DOM without sanitization.

CVSS severity5.4
Medium
EPSS probability0.27%
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 Fabric.js before 7.4.0 allows remote attackers to execute JavaScript through crafted gradient colors in exported SVG. The toSVG() path inserts each fabric.Gradient colorStops color value into an SVG stop-color attribute without escaping quotes or angle brackets, allowing the value to terminate the attribute and inject markup. Exploitation requires an application to accept attacker-controlled gradient definitions, export them with toSVG(), and insert the generated SVG into a victim's DOM without sanitization.

The record

CVE
CVE-2026-44311
Published
Jun 22, 2026
Updated
Jun 22, 2026
Vendor
Fabric.js
Product
Fabric.js
Classifications
CWE-79, CWE-116, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 22, 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=< 7.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fabric.js · Fabric.jsversion=< 7.4.0

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.4GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-116Improper Encoding or Escaping of Output
T1203Exploitation for Client Execution

Public exploit references

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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