{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-58253", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-29T21:54:30.330Z", "datePublished": "2026-07-08T19:43:13.776Z", "dateUpdated": "2026-07-08T19:43:13.776Z"}, "containers": {"cna": {"title": "NATS Server: Route API Auth Bypass", "problemTypes": [{"descriptions": [{"cweId": "CWE-287", "lang": "en", "description": "CWE-287: Improper Authentication", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "LOW", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/nats-io/nats-server/security/advisories/GHSA-38x3-76xf-cq45", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-38x3-76xf-cq45"}, {"name": "https://github.com/nats-io/nats-server/commit/7b81dd455ea95960090a84858c7662827948d1b6", "tags": ["x_refsource_MISC"], "url": "https://github.com/nats-io/nats-server/commit/7b81dd455ea95960090a84858c7662827948d1b6"}, {"name": "https://github.com/nats-io/nats-server/commit/8b8e1ad4ceed32321e00d4fc6e76be05bc13bca6", "tags": ["x_refsource_MISC"], "url": "https://github.com/nats-io/nats-server/commit/8b8e1ad4ceed32321e00d4fc6e76be05bc13bca6"}, {"name": "https://github.com/nats-io/nats-server/commit/b86147e81710a52b72a7f7275f91d69f723f5cb3", "tags": ["x_refsource_MISC"], "url": "https://github.com/nats-io/nats-server/commit/b86147e81710a52b72a7f7275f91d69f723f5cb3"}, {"name": "https://github.com/nats-io/nats-server/releases/tag/v2.11.16", "tags": ["x_refsource_MISC"], "url": "https://github.com/nats-io/nats-server/releases/tag/v2.11.16"}, {"name": "https://github.com/nats-io/nats-server/releases/tag/v2.12.7", "tags": ["x_refsource_MISC"], "url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.7"}, {"name": "https://github.com/nats-io/nats-server/releases/tag/v2.14.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/nats-io/nats-server/releases/tag/v2.14.0"}], "affected": [{"vendor": "nats-io", "product": "nats-server", "versions": [{"version": "< 2.11.16", "status": "affected"}, {"version": ">= 2.12.0-preview.1, < 2.12.6", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-08T19:43:13.776Z"}, "descriptions": [{"lang": "en", "value": "NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, when no_auth_user was configured, a parser fast path intended for ordinary client connections could also apply to route or leafnode listeners, allowing an unauthenticated peer to bypass inter-server CONNECT authentication and operate with the privileges associated with that connection type. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16."}], "source": {"advisory": "GHSA-38x3-76xf-cq45", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{}