SSRF in Decolua 9router
CVE-2026-63313
9Router before 0.4.72 contains a server-side request forgery (SSRF) vulnerability in the /v1/web/fetch endpoint. The endpoint accepts a user-controlled url parameter and passes it to a configured external scraping provider (Firecrawl, Jina Reader, Tavily, or Exa) to fetch content. The URL is only validated as syntactically valid via new URL() with no blocklist for private IP ranges, cloud metadata endpoints (e.g., 169.254.169.254), link-local addresses, or internal hostnames. An authenticated or locally-connected user can cause the server to fetch arbitrary internal URLs and have the response content returned, enabling read-access SSRF that can expose cloud metadata credentials, reach internal services, and bypass authentication on localhost endpoints.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (39.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Decolua 9router — versions 0, 0.4.72
Weakness classification (CWE)
References
- github.com/decolua/9router/security/advisories/GHSA-qj3v-64wj-q825 (vendor-advisory)
- www.vulncheck.com/advisories/9router-before-server-side-request-forgery-via-v1-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-63313?
- CVE-2026-63313 is a high-severity vulnerability in Decolua 9router, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-07-23.
- How severe is CVE-2026-63313?
- High severity. CVSS v3 base score is 7.7 out of 10.