# CVE-2026-2113: yuan1994 tpadmin WebUploader preview.php deserialization

> Remote attackers can exploit a deserialization flaw in the WebUploader preview script of the unsupported tpadmin application to execute arbitrary code.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Feb 2026
- **Updated:** 23 Feb 2026
- **Also known as:** GHSA-2pp3-pxpf-p8gg

## What is CVE-2026-2113?

CVE-2026-2113 is a medium-severity unsafe deserialization vulnerability in yuan1994 tpadmin, published on 7 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A security vulnerability has been detected in yuan1994 tpadmin up to 1.3.12. This affects an unknown part in the library /public/static/admin/lib/webuploader/0.1.5/server/preview.php of the component WebUploader. The manipulation leads to deserialization. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-502 (Deserialization of Untrusted Data), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-2113?

It affects 1 product.


Products: Tpadmin Project Tpadmin.

## How do I fix CVE-2026-2113?

No fix has been published for CVE-2026-2113 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-2113 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2113 exists.

Public exploit code:

- A Remote Code Execution vulnerability allowing unauthenticated attackers to upload arbitrary PHP files directly to the web server. This results in immediate Remote Code Execution with web server privileges. (github_poc): https://github.com/MaxMnMl/tpadmin-CVE-2026-2113-poc
- tpadmin <= 1.3.12 - Remote Code Execution (nuclei): http/cves/2026/CVE-2026-2113.yaml

## Other vulnerabilities in yuan1994 tpadmin

- [CVE-2023-1970](https://insights.sbomify.com/CVE-2023-1970/): yuan1994 tpAdmin Upload.php Upload unrestricted upload (medium 6.3)
- [CVE-2023-1971](https://insights.sbomify.com/CVE-2023-1971/): yuan1994 tpAdmin Upload.php remote server-side request forgery (medium 6.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-2113 and fix it if it is affected.

What it is: CVE-2026-2113 is a medium-severity unsafe deserialization vulnerability in yuan1994 tpadmin, published on 7 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2113 exists.

Affected product: yuan1994 tpadmin. 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-2026-2113/ (Markdown: https://insights.sbomify.com/CVE-2026-2113/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-2113
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2113
- OSV: https://osv.dev/vulnerability/CVE-2026-2113

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-2113/
Summaries are generated and may contain mistakes; the official description above is the record.