# CVE-2026-101148: BackupSheep <= 1.8 - Unauthenticated Arbitrary File Deletion and Backup Exfiltration via Empty Integration Key

> Unauthenticated attackers can download full site backups and delete arbitrary files due to improper validation of the integration key.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Oct 2026
- **Updated:** 1 Oct 2026
- **Also known as:** GHSA-3m4x-3wq2-6jqf

## What is CVE-2026-101148?

CVE-2026-101148 is a critical missing authorization vulnerability in Unknown BackupSheep WordPress Backup Plugin, published on 1 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The BackupSheep WordPress Backup Plugin WordPress plugin through 1.8 does not properly validate its integration key, treating an unset or blank key as valid, which allows unauthenticated attackers to create and download full site backups, including the database with user password hashes, and to delete arbitrary files on the server, leading to sensitive data disclosure and site takeover.

The BackupSheep WordPress Backup Plugin WordPress plugin through 1.8 has been closed on WordPress.org since July 2024 and no fixed version is available. Remove it from any site where it is installed.

Weakness: CWE-73 (External Control of File Name or Path)

## Which versions are affected by CVE-2026-101148?


## How do I fix CVE-2026-101148?

No fix has been published for CVE-2026-101148 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-101148 being exploited?

There is no known exploitation of CVE-2026-101148 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-101148 and fix it if it is affected.

What it is: CVE-2026-101148 is a critical missing authorization vulnerability in Unknown BackupSheep WordPress Backup Plugin, published on 1 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-101148 in the wild and no public exploit code.

Affected product: Unknown BackupSheep WordPress Backup Plugin. 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-2026-101148/ (Markdown: https://insights.sbomify.com/CVE-2026-101148/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-101148
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-101148
- OSV: https://osv.dev/vulnerability/CVE-2026-101148

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-101148/
Summaries are generated and may contain mistakes; the official description above is the record.