CVE-2026-110907: CWE-669 Incorrect Resource Transfer Between Spheres in BackdropCMS Backdrop
Description
Backdrop CMS versions 1.34.x before 1.34.6 and 1.35.x before 1.35.2 have a vulnerability related to improper handling of tokens. The token browser does not sufficiently restrict access to token types, potentially allowing unauthorized access to certain token categories. However, individual token names remain protected.
CVSS v3.1
Score 7.5high
Affected software
BackdropCMS
Backdrop
pkg:github/BackdropRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-110907 describes a vulnerability in Backdrop CMS Core where the token browser component does not adequately limit access to the types of tokens available for selection. Tokens are placeholders used to insert dynamic data into text. While the names of individual tokens are protected, the insufficient restriction on token types could lead to unauthorized exposure of token categories. This issue affects Backdrop CMS versions >=1.34.0 <1.34.6 and >=1.35.0 <1.35.2.
Potential Impact
The vulnerability allows an attacker to access token types that should be restricted, potentially exposing sensitive dynamic data placeholders. The CVSS score of 7.5 indicates a high severity with network attack vector, no privileges required, no user interaction, and high confidentiality impact. There is no indication of integrity or availability impact.
Mitigation Recommendations
A fix is available in Backdrop CMS versions 1.34.6 and 1.35.2. Users should upgrade to these or later versions to remediate the vulnerability. No additional mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-10-15T02:09:35.398Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad03b962cdf04f656f87339
Added to database: 10/15/2026, 02:33:58 UTC
Last enriched: 10/15/2026, 02:48:24 UTC
Last updated: 10/15/2026, 02:49:00 UTC
Views: 4
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