# CVE-2026-7502: LinkStackOrg LinkStack Management Endpoint UserController.php saveLink authorization

> Attackers can bypass authorization in the saveLink function to modify links without proper permissions in LinkStack.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/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:** Not needed
- **Fix available:** No
- **Published:** 30 Apr 2026
- **Updated:** 1 May 2026
- **Also known as:** GHSA-mg7g-g2wv-6mhr

## What is CVE-2026-7502?

CVE-2026-7502 is a medium-severity missing authorization vulnerability in LinkStackOrg LinkStack, published on 30 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A security vulnerability has been detected in LinkStackOrg LinkStack up to 4.8.6. The affected element is the function saveLink of the file app/Http/Controllers/UserController.php of the component Management Endpoint. The manipulation leads to authorization bypass. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The pull request to fix this issue awaits acceptance.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key), CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-7502?


## How do I fix CVE-2026-7502?

No fix has been published for CVE-2026-7502 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-7502 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7502 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-7502 and fix it if it is affected.

What it is: CVE-2026-7502 is a medium-severity missing authorization vulnerability in LinkStackOrg LinkStack, published on 30 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7502 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-2026-7502/ (Markdown: https://insights.sbomify.com/CVE-2026-7502/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-7502
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-7502
- OSV: https://osv.dev/vulnerability/CVE-2026-7502

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-7502/
Summaries are generated and may contain mistakes; the official description above is the record.