{"answers":{"affected":"3 open source packages ship an affected version, including github.com/azukaar/cosmos-server.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49446 exists.","fix":"Upgrade github.com/azukaar/cosmos-server to 0.22.19 or later.","what":"CVE-2026-49446 is a medium-severity authentication bypass vulnerability in azukaar Cosmos-Server, published on 15 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-49446 and fix it if it is affected.\n\nWhat it is: CVE-2026-49446 is a medium-severity authentication bypass vulnerability in azukaar Cosmos-Server, published on 15 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49446 exists.\n\nAffected packages and fixed versions:\n- github.com/azukaar/cosmos-server (Go): affected all versions; fixed in 0.22.19\n- github.com/azukaar/cosmos-server (Go): affected all versions; fixed in 0.22.19\n- github.com/azukaar/cosmos-server (Go): affected all versions; fixed in 0.22.19\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-49446/ (Markdown: https://insights.sbomify.com/CVE-2026-49446/index.md)","id":"CVE-2026-49446","markdown":"https://insights.sbomify.com/CVE-2026-49446/index.md","name":"CVE-2026-49446","record":{"aliases":["GHSA-2rx5-2g7j-2659","GO-2026-6123"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["privilege_escalation","data_read","data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Home server gateway","requires_auth":"high_privilege","summary":"Attackers can bypass authentication and impersonate users or gain admin access by smuggling headers through the Constellation tunnel in Cosmos-Server.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":6.1,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-290","name":"Authentication Bypass by Spoofing"},{"id":"CWE-285","name":"Improper Authorization"}],"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.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Cosmos: Authentication bypass via forward-auth header smuggling on Constellation tunnel in Cosmos-Server","id":"CVE-2026-49446","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"Cosmos-Server's constellation public-devices endpoint accepts arbitrary bearer tokens","id":"CVE-2026-49447"},"packages":[{"ecosystem":"Go","fixed":["0.22.19"],"introduced":["0"],"last_affected":[],"package":"github.com/azukaar/cosmos-server","purl":null,"source":"GHSA-2rx5-2g7j-2659"},{"ecosystem":"Go","fixed":["0.22.19"],"introduced":["0"],"last_affected":[],"package":"github.com/azukaar/cosmos-server","purl":"pkg:golang/github.com/azukaar/cosmos-server","source":"GHSA-2rx5-2g7j-2659"},{"ecosystem":"Go","fixed":["0.22.19"],"introduced":["0"],"last_affected":[],"package":"github.com/azukaar/cosmos-server","purl":"pkg:golang/github.com/azukaar/cosmos-server","source":"GO-2026-6123"}],"prev":{"headline":"Cilium: Sensitive information disclosure and cluster disruption via local Envoy admin socket access","id":"CVE-2026-49445"},"products":["Cosmos-Server"],"published":"2026-09-15","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-15","vendors":["azukaar"]},"summary":"Attackers can bypass authentication and impersonate users or gain admin access by smuggling headers through the Constellation tunnel in Cosmos-Server.","url":"https://insights.sbomify.com/CVE-2026-49446/"}