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  4. CVE 2026 56675 9router reverse proxy locality collapse allows
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Back to active CVEs
High · CVSS 8.3CVE-2026-56675GHSA-X5C9-V98J-722R

9router: Reverse proxy locality collapse allows unauthenticated access to 9router /v1 APIsCVE-2026-56675

Answer in brief

CVE-2026-56675 records a High severity (CVSS 8.3) vulnerability in 9router: Reverse proxy locality collapse allows unauthenticated access to 9router /v1 APIs. The current sources do not mark it as known exploited. The current feed maps decolua/9router (generic), 9router (npm). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 10, 2026Updated Oct 25, 2026Source checked Nov 5, 2026First seen by HOL Jul 10, 2026Material review Oct 25, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.3
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps decolua/9router (generic), 9router (npm). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
decolua/9routergeneric<0.5.20.5.2
9routernpm<=0.4.800.5.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for decolua/9router, 9router.
  2. 2Review the reported fix. Update decolua/9router to 0.5.2; 9router to 0.5.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jul 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record
  2. Source modified

    Oct 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record
  3. First seen by HOL

    Jul 10, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • NVD vulnerability recordnvd.nist.gov
Upstream source description

9Router is an AI router & token saver. Prior to 0.5.2, 9router treats loopback requests as trusted and allows /v1/* access without an API key, so a same-host reverse proxy that forwards public traffic to the backend through 127.0.0.1 causes src/dashboardGuard.js to misclassify external requests as local. A remote unauthenticated attacker can access /v1 APIs such as /v1/models and may abuse configured upstream provider credentials through /v1 proxy endpoints depending on enabled providers. This issue is fixed in version 0.5.2.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • FlexNet Beacon Missing Authentication VulnerabilityAlso CWE-306
  • Lack of authentication and authorization in the Images.ashx endpoint in MatchPointAlso CWE-306
  • OAuthLib: Bearer token can be retrieved as long as client knows a valid client ID for device workflowAlso CWE-287
  • Kubeflow Pipelines — API server fetches a caller-supplied pipelineURL without host validationAlso CWE-441
  • Model Context Protocol TypeScript SDK: One HTTP request within the default size limit could exhaust server memory during validationSame npm ecosystem
  • Model Context Protocol TypeScript SDK: HTTP client transports and OAuth requests followed cross-origin redirects and re-sent custom headers and request bodiesSame npm ecosystem

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-287, CWE-290, CWE-306, CWE-441
Source
CVE List V5
Source checked
Nov 5, 2026
References
5 linked sources
Open source record