CVE-2026-107914 Backdrop CMS - Broken Access Control

Backdrop CMS 1.34 < 1.34.5 and 1.35 < 1.35.1 contain an information disclosure vulnerability caused by insufficient protection of configuration exports in compressed archives, letting attackers with specific permissions access sensitive configuration data, exploit requires prior export request with proper permissions.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.12% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Published
9 October 2026
Updated
15 October 2026
Weakness
CWE-459

Vendor fix

Update to versions 1.34.5 or 1.35.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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