CVE-2026-104476

EUVD-2026-91852
Backdrop CMS before 1.35.1 contains an information disclosure vulnerability that allows unauthenticated attackers to retrieve configuration export archives left on the server after transfer. Attackers can download compressed archives generated by users with configuration export permission to obtain the full site configuration, including sensitive settings.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.9 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 19.7%
Common Weakness Enumeration
References
https://backdropcms.org/security/backdrop-sa-core-2026-006
https://github.com/backdrop/backdrop
https://github.com/backdrop/backdrop/commit/1ae67061d9d487bb6cb3b8611191354052f34749
https://www.vulncheck.com/advisories/backdrop-cms-before-1.35.1-information-disclosure-via-configuration-export-archive