CVE-2026-49446

{"id": "CVE-2026-49446", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49446", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-15T14:50:32.130417Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 0.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "azukaar", "product": "Cosmos-Server", "versions": [{"status": "affected", "version": "< 0.22.19"}]}]}], "published": "2026-09-15T15:17:16.747", "references": [{"url": "https://github.com/azukaar/Cosmos-Server/commit/59c561d686c8f9843b3e092b50f6346c481d8bbf", "source": "security-advisories@github.com"}, {"url": "https://github.com/azukaar/Cosmos-Server/releases/tag/v0.22.19", "source": "security-advisories@github.com"}, {"url": "https://github.com/azukaar/Cosmos-Server/security/advisories/GHSA-2rx5-2g7j-2659", "source": "security-advisories@github.com"}, {"url": "https://github.com/azukaar/Cosmos-Server/security/advisories/GHSA-2rx5-2g7j-2659", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Received", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-285"}, {"lang": "en", "value": "CWE-290"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-09-15T15:17:16.747", "sourceIdentifier": "security-advisories@github.com"}