{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45103", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-08T19:27:26.699Z", "datePublished": "2026-08-04T21:56:57.422Z", "dateUpdated": "2026-08-04T21:56:57.422Z"}, "containers": {"cna": {"title": "OpenSIPS: SIP Message Smuggling via TCP Content-Length Integer Overflow", "problemTypes": [{"descriptions": [{"cweId": "CWE-190", "lang": "en", "description": "CWE-190: Integer Overflow or Wraparound", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/OpenSIPS/opensips/security/advisories/GHSA-jv35-555v-54jh", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/OpenSIPS/opensips/security/advisories/GHSA-jv35-555v-54jh"}, {"name": "https://github.com/OpenSIPS/opensips/commit/4d23613b", "tags": ["x_refsource_MISC"], "url": "https://github.com/OpenSIPS/opensips/commit/4d23613b"}, {"name": "https://github.com/OpenSIPS/opensips/commit/5f103eff", "tags": ["x_refsource_MISC"], "url": "https://github.com/OpenSIPS/opensips/commit/5f103eff"}], "affected": [{"vendor": "OpenSIPS", "product": "opensips", "versions": [{"version": ">= 3.4.0, < 3.6.6", "status": "affected"}, {"version": ">= 4.0.0-beta, < 4.0.0-rc1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-04T21:56:57.422Z"}, "descriptions": [{"lang": "en", "value": "OpenSIPS is a Session Initiation Protocol (SIP) server implementation. In versions prior to 3.6.6 and 4.0.0-rc1, the TCP message framing layer parses the Content-Length header using unsigned int arithmetic with no overflow check. When an attacker sends a Content-Length value that overflows unsigned int (e.g., 4294967296), the framing layer computes a wrapped-around value (e.g., 0) and splits the TCP stream at the wrong boundary, causing the body of the first SIP message to be processed as a separate message and enabling SIP message smuggling. Because Content-Length is parsed in the transport layer before authentication, an unauthenticated, network-based attacker can smuggle arbitrary SIP messages over any TCP-based transport (proto_tcp, proto_tls, proto_ws, proto_wss) on any instance with TCP enabled, with no routing-script preconditions. This allows smuggled messages to bypass front-end SBC/proxy security policies, inherit the connection's authentication context, and evade rate limiting. This issue has been fixed in versions 3.6.6 and 4.0.0-rc1."}], "source": {"advisory": "GHSA-jv35-555v-54jh", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.4.0,3.6.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0-beta,4.0.0-rc1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "opensips", "source": "cna", "vendor": "OpenSIPS"}, "product": "opensips", "vendor": "opensips"}], "created": "2026-08-04T23:30:15.763530+00:00", "updated": "2026-08-04T23:30:15.879780+00:00", "vendors": ["opensips", "opensips$PRODUCT$opensips"]}