CVE-2026-115720
Frappe Builder before 1.36.1 contains a server-side request forgery vulnerability in builder/api.py where the assert_not_private_url() guard validates only the initial hostname before callers invoke requests.get(url) with default redirect-following and no IP pinning, allowing an attacker-supplied public URL to HTTP-redirect to internal or link-local addresses the guard never validated. An authenticated attacker can call the convert_to_webp endpoint, which lacks a permission decorator, with a URL that redirects to internal targets such as cloud metadata services to perform SSRF, internal port scanning, or trigger a request-hang denial of service due to the missing timeout.
- Score
- CVSS 4.0 5.3 Medium
- Status
- Deferred - disclosure@vulncheck.com
- Published
- 2026-10-26
- Last modified
- 2026-10-26
- Weaknesses
- CWE-918
Affected products
References
- https://github.com/frappe/builder/releases/tag/v1.36.1
- https://github.com/frappe/builder/security/advisories/GHSA-hvrf-fhv3-3v7p
- https://www.vulncheck.com/advisories/frappe-builder-before-ssrf-guard-bypass-via-http-redirect
