{"id":"CVE-2026-49446","revision":"f3914a3ff9b1412c9e2fbeaa58a118c0","records":[{"revision":"f3914a3ff9b1412c9e2fbeaa58a118c0","observedAt":"2026-10-25T12:17:38.331+00:00","statement":{"source":"nvd","id":"CVE-2026-49446","aliases":[],"title":"Cosmos provides users the ability self-host a home server by acting as a secure gateway to your application, as well as a server manager. Prior to 0.22.19, tokenMiddleware in src/proxy/routerGen.go can return through the Constellation tunne…","description":"Cosmos provides users the ability self-host a home server by acting as a secure gateway to your application, as well as a server manager. Prior to 0.22.19, tokenMiddleware in src/proxy/routerGen.go can return through the Constellation tunnel bypass before removing x-cosmos-user, x-cosmos-role, x-cosmos-user-role, and x-cosmos-mfa headers and before invoking AdminOnlyWithRedirect. An attacker with a valid x-cstln-auth API key for an enrolled device who reaches Cosmos through the Constellation Nebula tunnel can supply a chosen x-cosmos-user value to a route with AuthEnabled enabled when the upstream application trusts that forward-auth header. The request can bypass Cosmos JWT, password, MFA, and AdminOnly checks, allowing user impersonation and admin-tier reads or writes exposed by the proxied application. This issue is fixed in version 0.22.19.","state":0,"publishedAt":"2026-09-15T15:17:16.747+00:00","modifiedAt":"2026-09-30T17:51:56.193+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","score":6.1,"severity":"MEDIUM"}],"references":["https://github.com/azukaar/Cosmos-Server/commit/59c561d686c8f9843b3e092b50f6346c481d8bbf","https://github.com/azukaar/Cosmos-Server/releases/tag/v0.22.19","https://github.com/azukaar/Cosmos-Server/security/advisories/GHSA-2rx5-2g7j-2659"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-49446","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-285","CWE-290"],"productCriteria":[],"sourceDates":{"published":"2026-09-15T15:17:16.747","lastModified":"2026-09-30T17:51:56.193"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-49446","identifiers":["CVE-2026-49446"]},"retained":false,"historicalAffected":[]}],"coverage":[]}