# CVE-2026-5248: gougucms User Registration Login.php reg_submit dynamically-determined object attributes

> Remote attackers can manipulate object attributes during user registration to potentially escalate privileges or modify data in gougucms.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/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:** 1 Apr 2026
- **Updated:** 1 Apr 2026
- **Also known as:** GHSA-4q9h-crq4-9xjq

## What is CVE-2026-5248?

CVE-2026-5248 is a medium-severity vulnerability in gougucms, published on 1 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability has been found in gougucms 4.08.18. This affects the function reg_submit of the file gougucms-master\app\home\controller\Login.php of the component User Registration Handler. Such manipulation of the argument level leads to dynamically-determined object attributes. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-915 (Improperly Controlled Modification of Dynamically-Determined Object Attributes), CWE-913 (Improper Control of Dynamically-Managed Code Resources)

## Which versions are affected by CVE-2026-5248?


## How do I fix CVE-2026-5248?

No fix has been published for CVE-2026-5248 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5248 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5248 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5248 and fix it if it is affected.

What it is: CVE-2026-5248 is a medium-severity vulnerability in gougucms, published on 1 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-2026-5248 exists.

Affected product: gougucms. 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-2026-5248/ (Markdown: https://insights.sbomify.com/CVE-2026-5248/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5248
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5248
- OSV: https://osv.dev/vulnerability/CVE-2026-5248

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-5248/
Summaries are generated and may contain mistakes; the official description above is the record.