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.

Attack Vector Network

Attack Complexity High

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
backdrop backdrop unaffected
Version Status Constraints
0 affected < 1.35.1
1.35.1 unaffected —

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Project Subscriptions

Vendors Products
Backdropcms Subscribe
Backdrop Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://backdropcms.org/security/backdrop-sa-core-2026-006 cve-icon cve-icon
https://github.com/backdrop/backdrop cve-icon cve-icon
https://github.com/backdrop/backdrop/commit/1ae67061d9d487bb6cb3b8611191354052f34749 cve-icon cve-icon
https://www.vulncheck.com/advisories/backdrop-cms-before-1.35.1-information-disclosure-via-configuration-export-archive cve-icon cve-icon
History

Fri, 02 Oct 2026 23:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Backdrop CMS before 1.35.1 Information Disclosure via Configuration Export Archive
First Time appeared Backdropcms
Backdropcms backdrop
Weaknesses CWE-200
CPEs cpe:2.3:a:backdropcms:backdrop:*:*:*:*:*:*:*:*
Vendors & Products Backdropcms
Backdropcms backdrop
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-02T23:28:46.804Z

Reserved: 2026-10-02T00:55:58.388Z

Link: CVE-2026-104476

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-03T00:16:35.747

Modified: 2026-10-03T00:16:35.747

Link: CVE-2026-104476

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-03T00:30:19Z

Weaknesses