CVE-2026-556419router: Unauthenticated `/v1` proxy access via `Host`-header spoofing → open AI relay + SSRF
Updated under an hour ago ()
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It affects decolua 9router. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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9Router is an AI router & token saver. Prior to 0.5.2, 9router determines whether a /v1 LLM proxy request is local by reading the client-controlled Host header, allowing a remote unauthenticated attacker to send Host: localhost and bypass API-key authentication. In the default configuration, this exposes the /v1 proxy to upstream provider calls using stored provider credentials and allows /v1/search with the searxng provider_options.baseUrl parameter to drive server-side requests to internal or cloud-metadata hosts. This issue is fixed in version 0.5.2.
- CVSS
- 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
- Weakness (CWE)
- CWE-290, CWE-348, CWE-918, CWE-1327
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Jul 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
decolua 9router decolua:9router (from the name) | before 0.5.2 | CNA record |
References
- https://github.com/decolua/9router/security/advisories/GHSA-86m2-fcxq-5q7cx-refsource-confirm
- https://github.com/decolua/9router/commit/b282f0554972ea35281520738759d76abcd0b0b3x-refsource-misc
- https://github.com/decolua/9router/releases/tag/v0.5.2x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.