Vulnerability · Published Oct 20, 2026 · Assigned by VulnCheck
CVE-2026-113703SuggestArr before 3.0.0 Authentication Bypass via X-Forwarded-For Spoofing
Critical 9.3
In plain English
A critical-severity authentication bypass by spoofing in SuggestArr from giuseppe99barchetta. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Official description
SuggestArr before 3.0.0 contains an authentication bypass vulnerability in its local_bypass authentication mode where enforce_authentication() in api_service/auth/middleware.py trusts the client-controlled request.remote_addr value, which is derived from the spoofable X-Forwarded-For header due to ProxyFix(x_for=1) configuration in api_service/app.py. Attackers can send a request with X-Forwarded-For set to a trusted CIDR address such as 127.0.0.1 to be granted an unauthenticated admin session via _load_bypass_user_context(), gaining full administrative access to endpoints like /api/users and /api/jobs without providing any credentials.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| giuseppe99barchetta | SuggestArr | 1.0.4 – before 3.0.0 |
Weakness: CWE-290 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
References
- SuggestArr v3.0.0 Release Notes release-notes, patch
- GitHub Security Advisory (GHSA-fcjm-xhw8-pmh5) vendor-advisory
- VulnCheck Advisory: SuggestArr before 3.0.0 Authentication Bypass via X-Forwarded-For Spoofing third-party-advisory