{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-116567", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-26T15:03:39.034Z", "datePublished": "2026-11-05T19:23:25.422Z", "dateUpdated": "2026-11-05T19:23:25.422Z"}, "containers": {"cna": {"title": "FreeSWITCH: Pre-authentication stack buffer overflow in mod_rtmp control-message handling", "problemTypes": [{"descriptions": [{"cweId": "CWE-121", "lang": "en", "description": "CWE-121: Stack-based Buffer Overflow", "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/signalwire/freeswitch/security/advisories/GHSA-hj6x-9653-p796", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/signalwire/freeswitch/security/advisories/GHSA-hj6x-9653-p796"}, {"name": "https://github.com/signalwire/freeswitch/commit/fc0db829b87d1a5a3043e355b4294c41851b13c6", "tags": ["x_refsource_MISC"], "url": "https://github.com/signalwire/freeswitch/commit/fc0db829b87d1a5a3043e355b4294c41851b13c6"}, {"name": "https://github.com/signalwire/freeswitch/releases/tag/v1.11.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/signalwire/freeswitch/releases/tag/v1.11.2"}], "affected": [{"vendor": "signalwire", "product": "freeswitch", "versions": [{"version": "< 1.11.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-05T19:23:25.422Z"}, "descriptions": [{"lang": "en", "value": "FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to 1.11.2, rtmp_handle_control() rendered an RTMP user-control message into a 200-byte stack buffer using an unbounded sprintf loop controlled by the wire message length. A body of roughly 70 bytes or more overflowed the stack before any RTMP login, because the handshake authenticates neither side. The flaw affects deployments that build and load mod_rtmp, which is disabled in the stock build and configuration but commonly exposes a listener on TCP port 1935 when enabled. One unauthenticated message can crash FreeSWITCH and end every active call; the constrained ASCII hex output has not yielded control-flow hijacking. This issue is fixed in version 1.11.2."}], "source": {"advisory": "GHSA-hj6x-9653-p796", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "freeswitch", "vendor": "signalwire", "versions": [{"status": "affected", "version": "< 1.11.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to 1.11.2, rtmp_handle_control() rendered an RTMP user-control message into a 200-byte stack buffer using an unbounded sprintf loop controlled by the wire message length. A body of roughly 70 bytes or more overflowed the stack before any RTMP login, because the handshake authenticates neither side. The flaw affects deployments that build and load mod_rtmp, which is disabled in the stock build and configuration but commonly exposes a listener on TCP port 1935 when enabled. One unauthenticated message can crash FreeSWITCH and end every active call; the constrained ASCII hex output has not yielded control-flow hijacking. This issue is fixed in version 1.11.2."}], "id": "CVE-2026-116567", "lastModified": "2026-11-05T22:38:13.080", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-11-05T20:17:43.837", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/signalwire/freeswitch/commit/fc0db829b87d1a5a3043e355b4294c41851b13c6"}, {"source": "security-advisories@github.com", "url": "https://github.com/signalwire/freeswitch/releases/tag/v1.11.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/signalwire/freeswitch/security/advisories/GHSA-hj6x-9653-p796"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.11.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "freeswitch", "source": "cna", "vendor": "signalwire"}, "product": "freeswitch", "vendor": "signalwire"}], "created": "2026-11-05T20:30:16.085110+00:00", "updated": "2026-11-05T20:45:07.070697+00:00", "vendors": ["signalwire", "signalwire$PRODUCT$freeswitch"]}