# CVE-2026-49971: Laravel-Mediable < 7.0.0 Stored XSS via SVG File Upload

> Attackers can execute arbitrary JavaScript via malicious SVG uploads, leading to session theft and account takeover in applications using this library.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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:** No
- **Published:** 13 Jul 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-9j79-936r-7fx2

## What is CVE-2026-49971?

CVE-2026-49971 is a medium-severity cross-site scripting vulnerability in plank laravel-mediable, published on 13 Jul 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

Laravel-Mediable before 7.0.0 contains a stored cross-site scripting vulnerability that allows authenticated or anonymous users to execute arbitrary JavaScript by uploading unsanitized SVG files containing embedded scripts in onload event handlers, script tags, or foreignObject elements. Attackers can store persistent XSS payloads in uploaded SVG files that execute with full DOM access when victims open or preview the file, enabling session cookie theft, CSRF token capture, and account takeover.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-49971?


## How do I fix CVE-2026-49971?

No fix has been published for CVE-2026-49971 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-49971 being exploited?

There is no known exploitation of CVE-2026-49971 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-49971 and fix it if it is affected.

What it is: CVE-2026-49971 is a medium-severity cross-site scripting vulnerability in plank laravel-mediable, published on 13 Jul 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: There is no known exploitation of CVE-2026-49971 in the wild and no public exploit code.

Affected product: plank laravel-mediable. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2026-49971/ (Markdown: https://insights.sbomify.com/CVE-2026-49971/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-49971
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-49971
- OSV: https://osv.dev/vulnerability/CVE-2026-49971

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-49971/
Summaries are generated and may contain mistakes; the official description above is the record.