Vulnerability · Published Jul 13, 2026 · Assigned by VulnCheck

CVE-2026-623289Router 0.4.41 - Unauthenticated Information Disclosure via API Usage Endpoints

High 7.5

In plain English

A high-severity missing authorization in 9Router from decolua. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.5%top 60.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

9Router through version 0.4.41 contain an unauthenticated information disclosure vulnerability that allows remote attackers to access sensitive user data by sending requests to unprotected API endpoints. Attackers can enumerate paginated request logs and retrieve complete AI conversation histories including system prompts, user messages, assistant responses, tool calls, and user email addresses by querying the request-logs and request-details API routes which lack authentication middleware.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	9router	no fix listed	GHSA-vjc7-jrh9-9j86

Affected products (as reported)

Vendor	Product	Versions
decolua	9Router	0 – through 0.4.41

Weakness: CWE-862, CWE-359 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-vjc7-jrh9-9j86) vendor-advisory
VulnCheck Advisory: 9Router 0.4.41 - Unauthenticated Information Disclosure via API Usage Endpoints third-party-advisory