What’s Vulnerable › Vulnerabilities

CVE-2026-113703: SuggestArr before 3.0.0 Authentication Bypass via X-Forwarded-For Spoofing

• Severity: critical (CVSS 9.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-20 · updated 2026-10-20
• Weakness: CWE-290

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

• giuseppe99barchetta SuggestArr: from 1.0.4 before 3.0.0 — fixed in 3.0.0

How to fix

Upgrade to a fixed version: giuseppe99barchetta SuggestArr 3.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/giuseppe99barchetta/SuggestArr/releases/tag/v3.0.0
• https://github.com/giuseppe99barchetta/SuggestArr/security/advisories/GHSA-fcjm-xhw8-pmh5
• https://www.vulncheck.com/advisories/suggestarr-before-authentication-bypass-via-x-forwarded-for-spoofing
• https://github.com/giuseppe99barchetta/SuggestArr/security/advisories/GHSA-fcjm-xhw8-pmh5

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