{"answers":{"affected":"3 open source packages ship an affected version, including github.com/juev/nebula-mesh.","exploited":"There is no known exploitation of CVE-2026-49258 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-49258 is a high-severity missing authorization vulnerability in juev nebula-mesh, published on 28 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-49258 and fix it if it is affected.\n\nWhat it is: CVE-2026-49258 is a high-severity missing authorization vulnerability in juev nebula-mesh, published on 28 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-49258 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/juev/nebula-mesh (Go): affected all versions; no fix listed\n- github.com/juev/nebula-mesh (Go): affected all versions up to 0.3.4; no fix listed\n- github.com/juev/nebula-mesh (Go): affected all versions up to 0.3.4; no fix listed\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-2026-49258/ (Markdown: https://insights.sbomify.com/CVE-2026-49258/index.md)","id":"CVE-2026-49258","markdown":"https://insights.sbomify.com/CVE-2026-49258/index.md","name":"CVE-2026-49258","record":{"aliases":["GHSA-c6v2-3ffm-vcmc","GO-2026-5816"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Nebula Mesh control plane","requires_auth":"low_privilege","summary":"Authenticated non-admin operators can access, block, or delete other operators' hosts and networks due to missing ownership checks in the web UI.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-862","name":"Missing Authorization"},{"id":"CWE-639","name":"Authorization Bypass Through User-Controlled Key"}],"description":"Nebula Mesh is a self-hosted control plane for the Slack Nebula mesh VPN. In versions 0.3.5 and below, the web UI (/ui/*) does not apply the per-operator CA scoping employed by the JSON API. This was partially addressed by GHSA-598g-h2vc-h5vg, but the changes were not implemented in the web read/mutation surface. Any authenticated non-admin operator (for example, one created via self-registration or OIDC) can access resources belonging to other operators. The host create/edit/mobile-bundle/network-create paths and all CA-management routes were already correctly scoped. A malicious operator could block or delete any other operator's host, or read any operator's hosts and networks. This issue has been fixed in version 0.3.6.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Nebula Mesh: Web UI lacks ownership checks, enabling cross-operator access to hosts and networks (read, block, delete)","id":"CVE-2026-49258","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"php-weasyprint: shell command injection via configurable WeasyPrint binary path due to inverted is_executable() guard (mirror of KnpLabs/snappy GHSA-vpr4-p6fq-85jc)","id":"CVE-2026-49260"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/juev/nebula-mesh","purl":"pkg:golang/github.com/juev/nebula-mesh","source":"GO-2026-5816"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["0.3.4"],"package":"github.com/juev/nebula-mesh","purl":null,"source":"GHSA-c6v2-3ffm-vcmc"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["0.3.4"],"package":"github.com/juev/nebula-mesh","purl":"pkg:golang/github.com/juev/nebula-mesh","source":"GHSA-c6v2-3ffm-vcmc"}],"prev":{"headline":"mcp-pinot: Unauthenticated tool invocation via default oauth_enabled=False + host 0.0.0.0 bind","id":"CVE-2026-49257"},"products":["nebula-mesh"],"published":"2026-07-28","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":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-28","vendors":["juev"]},"summary":"Authenticated non-admin operators can access, block, or delete other operators' hosts and networks due to missing ownership checks in the web UI.","url":"https://insights.sbomify.com/CVE-2026-49258/"}