{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-58250", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-29T21:54:30.330Z", "datePublished": "2026-07-08T19:48:55.058Z", "dateUpdated": "2026-07-08T19:48:55.058Z"}, "containers": {"cna": {"title": "NATS Server: Pre-auth server crash via double INFO in leafnode handshake", "problemTypes": [{"descriptions": [{"cweId": "CWE-476", "lang": "en", "description": "CWE-476: NULL Pointer Dereference", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/nats-io/nats-server/security/advisories/GHSA-3g5q-cfh2-cq67", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-3g5q-cfh2-cq67"}, {"name": "https://github.com/nats-io/nats-server/commit/8dcb26eaea78fdcbe96dbee5986d6019fd5cb94a", "tags": ["x_refsource_MISC"], "url": "https://github.com/nats-io/nats-server/commit/8dcb26eaea78fdcbe96dbee5986d6019fd5cb94a"}, {"name": "https://github.com/nats-io/nats-server/commit/fc5fe39177533e9dbdd651d2458285bfae1dde27", "tags": ["x_refsource_MISC"], "url": "https://github.com/nats-io/nats-server/commit/fc5fe39177533e9dbdd651d2458285bfae1dde27"}, {"name": "https://github.com/nats-io/nats-server/releases/tag/v2.11.17", "tags": ["x_refsource_MISC"], "url": "https://github.com/nats-io/nats-server/releases/tag/v2.11.17"}, {"name": "https://github.com/nats-io/nats-server/releases/tag/v2.12.8", "tags": ["x_refsource_MISC"], "url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.8"}], "affected": [{"vendor": "nats-io", "product": "nats-server", "versions": [{"version": "< 2.11.17", "status": "affected"}, {"version": ">= 2.12.0-preview.1, < 2.12.8", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-08T19:48:55.058Z"}, "descriptions": [{"lang": "en", "value": "NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with network access to a leafnode listener with compression enabled could crash the server during the pre-authentication leafnode handshake by sending repeated leafnode INFO protocol messages before authentication and account setup completed. This issue is fixed in versions 2.12.8 and 2.11.17."}], "source": {"advisory": "GHSA-3g5q-cfh2-cq67", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{}