What is CVE-2026-110907?

CVE-2026-110907 is a high-severity vulnerability in Backdropcms Backdrop, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 7.5/10. Published 2026-10-15.

How severe is CVE-2026-110907?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Backdropcms Backdrop

CVE-2026-110907

Backdrop CMS Core 1.35.x before 1.35.2 and 1.34.x before 1.34.6 mishandles tokens. A token is a small placeholder string (like [node:title] or [user:name]) used to automatically insert dynamic data into text. A browser is provided for selecting tokens by type. The product doesn't sufficiently limit access to the types of tokens that are available in the token browser. The names of the individual tokens are adequately protected.

Published 2026-10-15.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Backdropcms Backdrop

Weakness classification (CWE)

CWE-669 — Incorrect Resource Transfer Between Spheres

References

backdropcms.org/security/backdrop-sa-core-2026-009 (vendor-advisory)

Frequently asked questions

What is CVE-2026-110907?: CVE-2026-110907 is a high-severity vulnerability in Backdropcms Backdrop, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 7.5/10. Published 2026-10-15.
How severe is CVE-2026-110907?: High severity. CVSS v3 base score is 7.5 out of 10.