# CVE-2026-7501: LinkStackOrg LinkStack UserController.php editPage cross site scripting

> Remote attackers can inject malicious scripts via the pageDescription field in LinkStack, potentially leading to code execution or account takeover.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`)
- **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:** 30 Apr 2026
- **Updated:** 1 May 2026
- **Also known as:** GHSA-3v6f-p2hc-xq2j

## What is CVE-2026-7501?

CVE-2026-7501 is a medium-severity cross-site scripting vulnerability in LinkStackOrg LinkStack, published on 30 Apr 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 weakness has been identified in LinkStackOrg LinkStack up to 4.8.6. Impacted is the function editPage of the file app/Http/Controllers/UserController.php. Executing a manipulation of the argument pageDescription can lead to cross site scripting. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through a pull request but has not reacted yet.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-7501?


## How do I fix CVE-2026-7501?

No fix has been published for CVE-2026-7501 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-7501 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7501 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-7501 and fix it if it is affected.

What it is: CVE-2026-7501 is a medium-severity cross-site scripting vulnerability in LinkStackOrg LinkStack, published on 30 Apr 2026. Any signed-in user can exploit it over the network, 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-2026-7501 exists.

Affected product: LinkStackOrg LinkStack. 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-2026-7501/ (Markdown: https://insights.sbomify.com/CVE-2026-7501/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-7501
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-7501
- OSV: https://osv.dev/vulnerability/CVE-2026-7501

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-7501/
Summaries are generated and may contain mistakes; the official description above is the record.