CVE-2026-104476
Published:October 02, 2026
Updated:October 13, 2026
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.
Affected Packages
https://github.com/backdrop/backdrop.git (GITHUB):
Affected version(s) >=1.0.6 <1.34.5Fix Suggestion:
Update to version 1.34.5https://github.com/backdrop/backdrop.git (GITHUB):
Affected version(s) >=1.35.0 <1.35.1Fix Suggestion:
Update to version 1.35.1backdrop/backdrop (PHP):
Affected version(s) =1.35.0 <1.35.1Fix Suggestion:
Update to version 1.35.1Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Exposure of Sensitive Information to an Unauthorized Actor
EPSS
Base Score:
0.29