CVE-2026-115718

Medium

Description

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.

SeverityMedium

CVSS4.3

Exploit probability—

Product

Frappe Builder

PublishedOct 26, 2026

First seenOct 26, 2026

Weakness typeCWE-862Missing authorization

How to fix

Update

frappe builder1.36.0 or later

Patches

github.com/frappe/builder/releases/tag/v1.36.0

Vendor advisories

github.com/frappe/builder/security/advisories/GHSA-58mj-c563-p78w

Affected products

Product	Affected versions	Fixed in
frappe builder	1.33.0 ≤ v < 1.36.0	1.36.0

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