{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-73564",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-08-12T20:53:46.380Z",
        "datePublished": "2026-08-13T17:35:46.762Z",
        "dateUpdated": "2026-08-13T17:53:06.534Z"
    },
    "containers": {
        "cna": {
            "title": "frp: Unauthenticated Remote Denial of Service in the frp SSH Tunnel Gateway via Integer Overflow",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-129",
                            "lang": "en",
                            "description": "CWE-129: Improper Validation of Array Index",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-190",
                            "lang": "en",
                            "description": "CWE-190: Integer Overflow or Wraparound",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.7,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/fatedier/frp/security/advisories/GHSA-26gq-p25f-99cp",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/fatedier/frp/security/advisories/GHSA-26gq-p25f-99cp"
                },
                {
                    "name": "https://github.com/fatedier/frp/pull/5428",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/fatedier/frp/pull/5428"
                },
                {
                    "name": "https://github.com/fatedier/frp/commit/7dc7be930e2452ae93fd32f2a77f8c6fcd0b652b",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/fatedier/frp/commit/7dc7be930e2452ae93fd32f2a77f8c6fcd0b652b"
                },
                {
                    "name": "https://github.com/fatedier/frp/releases/tag/v0.70.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/fatedier/frp/releases/tag/v0.70.1"
                }
            ],
            "affected": [
                {
                    "vendor": "fatedier",
                    "product": "frp",
                    "versions": [
                        {
                            "version": ">= 0.53.0, < 0.70.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-13T17:35:46.762Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "frp is a fast reverse proxy. From 0.53.0 until 0.70.1, frp's optional SSH Tunnel Gateway in pkg/ssh/server.go parses an SSH exec channel request by adding 4 to an attacker-controlled four-byte big-endian length. A length of 0xFFFFFFFF makes the uint32 addition wrap to 3, defeats the payload bounds check, and causes payload[4:3] to panic in TunnelServer.handleNewChannel. When no authorized-keys file is configured, sshConfig.NoClientAuth permits an unauthenticated peer to reach this channel phase before the frp token is checked, so a single five-byte request terminates the frps process and drops every active tunnel. This issue is fixed in version 0.70.1."
                }
            ],
            "source": {
                "advisory": "GHSA-26gq-p25f-99cp",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/fatedier/frp/security/advisories/GHSA-26gq-p25f-99cp",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-13T17:52:30.634352Z",
                                "id": "CVE-2026-73564",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "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": "2026-08-13T17:53:06.534Z"
                }
            }
        ]
    }
}