CVE-2026-49258

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{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-49258", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-28T14:33:01.179Z", "datePublished": "2026-07-28T18:52:58.713Z", "dateUpdated": "2026-07-28T19:21:43.453Z"}, "containers": {"cna": {"title": "Nebula Mesh: Web UI lacks ownership checks, enabling cross-operator access to hosts and networks (read, block, delete)", "problemTypes": [{"descriptions": [{"cweId": "CWE-639", "lang": "en", "description": "CWE-639: Authorization Bypass Through User-Controlled Key", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-862", "lang": "en", "description": "CWE-862: Missing Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-c6v2-3ffm-vcmc", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-c6v2-3ffm-vcmc"}, {"name": "https://github.com/forgekeep/nebula-mesh/pull/161", "tags": ["x_refsource_MISC"], "url": "https://github.com/forgekeep/nebula-mesh/pull/161"}], "affected": [{"vendor": "juev", "product": "nebula-mesh", "versions": [{"version": "< 0.3.6", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-28T18:52:58.713Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-c6v2-3ffm-vcmc", "discovery": "UNKNOWN"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-49258", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-07-28T19:21:26.834734Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-28T19:21:37.147Z"}}]}}

{"affected": [{"affectedData": [{"product": "nebula-mesh", "vendor": "juev", "versions": [{"status": "affected", "version": "< 0.3.6"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Nebula Mesh es un plano de control autoalojado para la VPN de malla Slack Nebula. En las versiones 0.3.5 e inferiores, la interfaz de usuario web (/ui/*) no aplica el alcance de CA por operador empleado por la API JSON. Esto fue abordado parcialmente por GHSA-598g-h2vc-h5vg, pero los cambios no fueron implementados en la superficie de lectura/mutaci\u00f3n web. Cualquier operador autenticado no administrador (por ejemplo, uno creado mediante autorregistro u OIDC) puede acceder a recursos pertenecientes a otros operadores. Las rutas de creaci\u00f3n/edici\u00f3n de host/paquete m\u00f3vil/creaci\u00f3n de red y todas las rutas de gesti\u00f3n de CA ya estaban correctamente delimitadas. Un operador malicioso podr\u00eda bloquear o eliminar el host de cualquier otro operador, o leer los hosts y redes de cualquier operador. Este problema ha sido solucionado en la versi\u00f3n 0.3.6."}], "id": "CVE-2026-49258", "lastModified": "2026-10-23T23:10:00.157", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49258", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-07-28T19:21:26.834734Z", "version": "2.0.3"}}]}, "published": "2026-07-28T19:17:36.000", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/forgekeep/nebula-mesh/pull/161"}, {"source": "security-advisories@github.com", "url": "https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-c6v2-3ffm-vcmc"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}, {"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.3.6)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "nebula-mesh", "source": "cna", "vendor": "juev"}, "product": "nebula-mesh", "vendor": "juev"}], "created": "2026-07-28T20:30:16.692777+00:00", "updated": "2026-08-03T14:45:04.276248+00:00", "vendors": ["juev", "juev$PRODUCT$nebula-mesh"]}