# CVE-2026-44311: Fabric.js: Improper escaping in fabric.Gradient colorStops leads to XSS in SVG serialization

> Attackers can inject malicious scripts via unescaped gradient colors in SVG output, leading to XSS if the SVG is rendered in the browser.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 22 Jun 2026
- **Updated:** 23 Jun 2026
- **Also known as:** GHSA-w22m-hvvm-xmwx

## What is CVE-2026-44311?

CVE-2026-44311 is a medium-severity cross-site scripting vulnerability in fabricjs fabric.js, published on 22 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Fabric.js is a Javascript HTML5 canvas library. Prior to 7.4.0, a potential Cross-Site Scripting (XSS) vulnerability exists in Fabric.js due to improper escaping of user-controlled input during SVG serialization via the toSVG() method. Specifically, the color field within the colorStops array of a fabric.Gradient object is not properly escaped when converted into SVG <stop> elements. If an application renders the generated SVG string into the DOM, this may allow an attacker to inject arbitrary HTML/SVG and execute JavaScript in the victim's browser. This vulnerability is fixed in 7.4.0.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-116 (Improper Encoding or Escaping of Output)

## Which versions are affected by CVE-2026-44311?

2 open source packages ship an affected version, including fabric. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `fabric` | npm | All versions | 7.4.0 |
| `fabric` | npm | All versions | 7.4.0 |

Products: Fabricjs Fabric.js.

## How do I fix CVE-2026-44311?

Upgrade fabric to 7.4.0 or later.

## Is CVE-2026-44311 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44311 exists.

## Other vulnerabilities in fabricjs fabric.js

- [CVE-2026-27013](https://insights.sbomify.com/CVE-2026-27013/): Fabric.js Affected by Stored XSS via SVG Export (high 7.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-44311 and fix it if it is affected.

What it is: CVE-2026-44311 is a medium-severity cross-site scripting vulnerability in fabricjs fabric.js, published on 22 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44311 exists.

Affected packages and fixed versions:
- fabric (npm): affected all versions; fixed in 7.4.0
- fabric (npm): affected all versions; fixed in 7.4.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-44311/ (Markdown: https://insights.sbomify.com/CVE-2026-44311/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-44311
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-44311
- OSV: https://osv.dev/vulnerability/CVE-2026-44311

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-44311/
Summaries are generated and may contain mistakes; the official description above is the record.