CVE-2026-104476Backdrop CMS before 1.35.1 Information Disclosure via Configuration Export Archive
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-200
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
backdrop backdrop backdrop:backdrop (from the name) | before 1.35.1; 1.35.1 not affected | CNA record |
References
- https://github.com/backdrop/backdrop/commit/1ae67061d9d487bb6cb3b8611191354052f34749patch
- https://backdropcms.org/security/backdrop-sa-core-2026-006vendor-advisory
- https://github.com/backdrop/backdropproduct
- https://www.vulncheck.com/advisories/backdrop-cms-before-1.35.1-information-disclosure-via-configuration-export-archivethird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.