CVE-2026-110907 Backdrop CMS Core - Broken Access Control

Backdrop CMS Core 1.35.x < 1.35.2 and 1.34.x < 1.34.6 contain an information disclosure vulnerability caused by insufficient access control on token types in the token browser, letting attackers access restricted token types, exploit requires no special privileges.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
15 October 2026
Updated
15 October 2026
Weakness
CWE-669

Vendor fix

Upgrade to versions 1.35.2, 1.34.6 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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