{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-50161",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-03T20:54:20.432Z",
        "datePublished": "2026-08-18T17:53:01.696Z",
        "dateUpdated": "2026-08-19T15:11:15.350Z"
    },
    "containers": {
        "cna": {
            "title": "libre: Integer overflow in websock_decode() masked frame length check leads to heap buffer overflow",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-190",
                            "lang": "en",
                            "description": "CWE-190: Integer Overflow or Wraparound",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-787",
                            "lang": "en",
                            "description": "CWE-787: Out-of-bounds Write",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 9.3,
                        "baseSeverity": "CRITICAL",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/baresip/re/security/advisories/GHSA-hvxv-v2gp-v93h",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/baresip/re/security/advisories/GHSA-hvxv-v2gp-v93h"
                },
                {
                    "name": "https://github.com/baresip/re/pull/1584",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/baresip/re/pull/1584"
                },
                {
                    "name": "https://github.com/baresip/re/commit/718b92615c7963670d26c1a2b246968b58d782e8",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/baresip/re/commit/718b92615c7963670d26c1a2b246968b58d782e8"
                },
                {
                    "name": "https://github.com/baresip/re/releases/tag/v4.8.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/baresip/re/releases/tag/v4.8.1"
                }
            ],
            "affected": [
                {
                    "vendor": "baresip",
                    "product": "re",
                    "versions": [
                        {
                            "version": "< 4.8.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-18T17:53:01.696Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "libre is a generic library for real-time communications with asynchronous input and output support. Prior to 4.8.1, the websock_decode() function in src/websock/websock.c contains an integer overflow when validating a masked WebSocket frame that uses the 64-bit extended length encoding. The expression 4 + hdr->len can wrap when hdr->len is close to UINT64_MAX, causing the mbuf_get_left() bounds check to pass. The subsequent XOR unmasking loop then writes beyond the heap buffer. Applications using websock_accept() or websock_accept_proto() to implement a WebSocket server are affected, and exploitation can cause attacker-controlled heap corruption or denial of service after the HTTP WebSocket upgrade handshake. This issue is fixed in version 4.8.1."
                }
            ],
            "source": {
                "advisory": "GHSA-hvxv-v2gp-v93h",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-19T15:11:03.181573Z",
                                "id": "CVE-2026-50161",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-19T15:11:15.350Z"
                }
            }
        ]
    }
}