CVE-2026-115718
Frappe Builder versions 1.33.0 before1.36.0 contain a missing authorization vulnerability in the improve_prompt endpoint that allows any authenticated non-Guest session to invoke LLM completions without proper permission checks. Attackers can call the improve_prompt API to leverage the site owner's stored OpenRouter API key via resolve_api_key, consuming paid LLM credits and effectively turning the site into a free LLM proxy.
- Score
- CVSS 4.0 5.3 Medium
- Status
- Deferred - disclosure@vulncheck.com
- Published
- 2026-10-26
- Last modified
- 2026-10-26
- Weaknesses
- CWE-862
Affected products
References
- https://github.com/frappe/builder/releases/tag/v1.36.0
- https://github.com/frappe/builder/security/advisories/GHSA-58mj-c563-p78w
- https://www.vulncheck.com/advisories/frappe-builder-before-missing-authorization-via-improve-prompt
