CVE-2026-104476
Backdrop CMS before 1.35.1 Information Disclosure via Configuration Export Archive
- State
- Published
- Severity
- 8.2 High
- Published
- Oct 2, 2026
- Updated
- Oct 5, 2026
- Reserved
- Oct 2, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.2 High | 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 | VulnCheck |
| 3.1 | 5.9 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Affected Products
| Product | Versions |
|---|---|
backdropbackdrop |
|
References
- Patch Commitpatch
- BACKDROP-SA-CORE-2026-006vendor-advisory
- https://github.com/backdrop/backdropproduct
- VulnCheck Advisory: Backdrop CMS before 1.35.1 Information Disclosure via Configuration Export Archivethird-party-advisory
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