# CVE-2026-14856: Stored Cross-Site Scripting (XSS) in TastyIgniter Media Manager

> Authenticated users can upload malicious SVGs to execute scripts in admin browsers, potentially leading to full administrative account takeover.

- **Severity:** Medium 6.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 27 Jul 2026
- **Updated:** 27 Jul 2026
- **Also known as:** GHSA-h824-gwx2-93j6

## What is CVE-2026-14856?

CVE-2026-14856 is a medium-severity cross-site scripting vulnerability in Media Manager TastyIgniter, published on 27 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A stored Cross-Site Scripting (XSS) vulnerability in the file upload functionality of the Media Manager in TastyIgniter v4.3.0, caused by insufficient validation and sanitization of SVG files. An authenticated user with low privileges can upload a malicious SVG file containing JavaScript code. When an administrator views that file, the code executes in the context of their browser. By chaining this vulnerability with a Cross-Site Request Forgery (CSRF) attack, an attacker can extract the administrator’s CSRF token and perform unauthorized actions—such as modifying credentials—thereby gaining full control of the administrative account.

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

## Which versions are affected by CVE-2026-14856?


## How do I fix CVE-2026-14856?

No fix has been published for CVE-2026-14856 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-14856 being exploited?

There is no known exploitation of CVE-2026-14856 in the wild and no public exploit code.

Public exploit code:

- CVE-2026-14856 TastyIgniter v4.3.0 (github_poc): https://github.com/jonastrikex/CVE-2026-14856-TastyIgniter

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-14856 and fix it if it is affected.

What it is: CVE-2026-14856 is a medium-severity cross-site scripting vulnerability in Media Manager TastyIgniter, published on 27 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-14856 in the wild and no public exploit code.

Affected product: Media Manager TastyIgniter. 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-2026-14856/ (Markdown: https://insights.sbomify.com/CVE-2026-14856/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-14856
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-14856
- OSV: https://osv.dev/vulnerability/CVE-2026-14856

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-14856/
Summaries are generated and may contain mistakes; the official description above is the record.