Authentication bypass in SuggestArr via X-Forwarded-For spoofing
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-290.
Summary
SuggestArr from 1.0.4 before 3.0.0 has an authentication bypass in its local_bypass authentication mode. The enforce_authentication() check trusts the client's remote address, which can be set through the spoofable X-Forwarded-For header, so an attacker who sends that header with a trusted address such as 127.0.0.1 gets an unauthenticated admin session. An unauthenticated remote attacker can then reach administrative endpoints such as /api/users and /api/jobs without credentials. This is classified as CWE-290.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| giuseppe99barchetta | SuggestArr | 1.0.4 to before 3.0.0 | 3.0.0 | Patch available | CNA |
- SuggestArr Vendorgiuseppe99barchetta Affected 1.0.4 to before 3.0.0 Fixed in 3.0.0 Patch available CNA
Remediation
Update SuggestArr to version 3.0.0 or later, which fixes the flaw.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
- Fix · CNA SuggestArr (giuseppe99barchetta) Fixed in 3.0.0
Timeline
- 2026-10-20 Threatist record created from CVE-2026-113703
- 2026-10-21 Alias added: GHSA-4pm7-2f9h-vxj4
References
Sources
- CVE-2026-113703 · CVE Program
- CVE-2026-113703 · NVD
- FIRST EPSS
- GHSA-4pm7-2f9h-vxj4 · GitHub Advisory Database · CC BY 4.0
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