Vulnerability · Published Oct 2, 2026 · Assigned by VulnCheck
CVE-2026-104476Backdrop CMS before 1.35.1 Information Disclosure via Configuration Export Archive
Medium 5.9
In plain English
A medium-severity information exposure in backdrop from backdrop. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.3%top 78.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- Patch Commit patch
- BACKDROP-SA-CORE-2026-006 vendor-advisory
- https://github.com/backdrop/backdrop product
- VulnCheck Advisory: Backdrop CMS before 1.35.1 Information Disclosure via Configuration Export Archive third-party-advisory