What is CVE-2026-86826?

CVE-2026-86826 is a medium-severity vulnerability in Backwpup, classified under Information Disclosure. CVSS score: 5.9/10. Published 2026-10-08.

How severe is CVE-2026-86826?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Information disclosure in Backwpup

CVE-2026-86826

The BackWPup WordPress plugin before 5.7.7 does not properly restrict web access to the working directory it uses during backup restores, allowing unauthenticated attackers, on webservers that do not honour .htaccess rules such as NGINX, to download the full backup archive (database dump and site files, including credentials and secret keys) left behind by an interrupted restore.

Vulnerability class: Information Disclosure

Published 2026-10-08 · last modified 2026-10-08.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Backwpup

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

wpscan.com/vulnerability/ee9f0772-ac6f-4e2d-a2c0-cc8892291932/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-86826?: CVE-2026-86826 is a medium-severity vulnerability in Backwpup, classified under Information Disclosure. CVSS score: 5.9/10. Published 2026-10-08.
How severe is CVE-2026-86826?: Medium severity. CVSS v3 base score is 5.9 out of 10.