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.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
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
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.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-101148 being exploited?
There is no known exploitation of CVE-2026-101148 in the wild and no public exploit code.
Sources
Also known as GHSA-3m4x-3wq2-6jqf.