{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-68553",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-07-30T19:56:44.102Z",
        "datePublished": "2026-08-19T20:37:42.319Z",
        "dateUpdated": "2026-08-20T19:48:45.809Z"
    },
    "containers": {
        "cna": {
            "title": "Coturn: Format String Injection via TURN USERNAME/REALM into hiredis Redis Command",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-134",
                            "lang": "en",
                            "description": "CWE-134: Use of Externally-Controlled Format String",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7.1,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/coturn/coturn/security/advisories/GHSA-4g7c-p5wg-j4hp",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/coturn/coturn/security/advisories/GHSA-4g7c-p5wg-j4hp"
                },
                {
                    "name": "https://github.com/coturn/coturn/commit/8fa38032bb4751e11e072d65a8eca3c06c950979",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/coturn/coturn/commit/8fa38032bb4751e11e072d65a8eca3c06c950979"
                },
                {
                    "name": "https://github.com/coturn/coturn/releases/tag/4.13.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/coturn/coturn/releases/tag/4.13.0"
                }
            ],
            "affected": [
                {
                    "vendor": "coturn",
                    "product": "coturn",
                    "versions": [
                        {
                            "version": "< 4.13.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-19T20:37:42.319Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.0, an authenticated TURN user can place printf-style format specifiers in the STUN USERNAME or REALM attribute, which passes is_secure_string() validation and is embedded into Redis keys at nine call sites in src/apps/relay/ns_ioalib_engine_impl.c. send_message_to_redis() in src/apps/relay/hiredis_libevent2.c then passes the attacker-controlled key as the format argument to redisAsyncCommand() while supplying only one variadic value, causing hiredis redisvFormatCommand() to read past the va_list. Exploitation can crash the coturn process and terminate active TURN sessions or disclose stack memory into Redis. This issue is fixed in version 4.13.0."
                }
            ],
            "source": {
                "advisory": "GHSA-4g7c-p5wg-j4hp",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/coturn/coturn/security/advisories/GHSA-4g7c-p5wg-j4hp",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-20T19:48:40.817549Z",
                                "id": "CVE-2026-68553",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "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": "2026-08-20T19:48:45.809Z"
                }
            }
        ]
    }
}