CVE-2026-104476 Backdrop CMS before 1.35.1 Information Disclosure via Configuration Export Archive
Unauthenticated attackers can download leftover configuration export archives to obtain sensitive site settings.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104476?
CVE-2026-104476 is a high-severity vulnerability in backdrop, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-200
Which versions are affected by CVE-2026-104476?
How do I fix CVE-2026-104476?
No fix has been published for CVE-2026-104476 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-104476 being exploited?
There is no known exploitation of CVE-2026-104476 in the wild and no public exploit code.
Sources
Also known as GHSA-62pf-58wj-9727.