CVE-2026-86828 BackWPup < 5.7.7 - Admin+ Path Traversal to RCE via Restore PclZip Fallback
High-privileged users can exploit path traversal in BackWPup to write files outside the restore directory, leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86828?
CVE-2026-86828 is a medium-severity path traversal vulnerability in Unknown BackWPup, published on 8 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The BackWPup WordPress plugin before 5.7.7 does not properly restrict the destination path of files extracted during a backup restore when its fallback archive library is used, allowing high-privileged users to write files outside the intended restore directory, potentially leading to remote code execution.
Weakness: CWE-22
Which versions are affected by CVE-2026-86828?
How do I fix CVE-2026-86828?
No fix has been published for CVE-2026-86828 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-86828 being exploited?
There is no known exploitation of CVE-2026-86828 in the wild and no public exploit code.
Sources
Also known as GHSA-5547-r7f3-wccc.