{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-110628",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-10-14T13:07:29.410Z",
        "datePublished": "2026-10-14T14:17:03.232Z",
        "dateUpdated": "2026-10-16T17:16:01.554Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
                "shortName": "VulnCheck",
                "dateUpdated": "2026-10-14T14:17:03.232Z"
            },
            "datePublic": "2026-09-05T00:00:00.000Z",
            "title": "Kan 0.5.5 through 0.6.0 Unauthenticated SSRF via /api/download/attatchment",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Kan 0.5.5 through 0.6.0 contains an unauthenticated server-side request forgery vulnerability in the /api/download/attatchment route due to an incomplete fix for CVE-2026-32255. When S3_ENDPOINT is unset, attackers can pass arbitrary url query parameters to fetch() to read internal services, localhost ports, and cloud instance metadata."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Server-Side Request Forgery (SSRF)",
                            "cweId": "CWE-918",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "kanbn",
                    "product": "kan",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "0.5.5",
                            "lessThanOrEqual": "0.6.0",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "collectionURL": "https://github.com",
                    "packageURL": "pkg:github/kanbn/kan",
                    "repo": "https://github.com/kanbn/kan"
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:kan:kan:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "0.5.5",
                                    "versionEndIncluding": "0.6.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "cvssV4_0": {
                        "version": "4.0",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 9.2,
                        "baseSeverity": "CRITICAL"
                    }
                },
                {
                    "format": "CVSS",
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "CHANGED",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "NONE",
                        "baseScore": 8.6,
                        "baseSeverity": "HIGH"
                    }
                }
            ],
            "references": [
                {
                    "url": "https://hackmd.io/@leediay/HyIxU63ofg",
                    "tags": [
                        "third-party-advisory"
                    ]
                },
                {
                    "url": "https://github.com/kanbn/kan/pull/590",
                    "tags": [
                        "issue-tracking",
                        "patch"
                    ],
                    "name": "Open PR describing the S3_ENDPOINT-unset bypass"
                },
                {
                    "url": "https://github.com/kanbn/kan/blob/v0.6.0/apps/web/src/pages/api/download/attatchment.ts#L21-L52",
                    "tags": [
                        "technical-description"
                    ],
                    "name": "allowlist conditional on S3_ENDPOINT, unconditional fetch(url)"
                },
                {
                    "url": "https://github.com/kanbn/kan/blob/v0.6.0/.env.example#L25-L27",
                    "tags": [
                        "technical-description"
                    ],
                    "name": "S3_ENDPOINT documented as blank for AWS S3"
                },
                {
                    "url": "https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "name": "GitHub Security Advisory (GHSA-qrx8-9hc6-jvqg)"
                },
                {
                    "url": "https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7",
                    "tags": [
                        "patch"
                    ],
                    "name": "Incomplete fix for CVE-2026-32255"
                },
                {
                    "url": "https://github.com/kanbn/kan",
                    "tags": [
                        "product"
                    ]
                },
                {
                    "name": "VulnCheck Advisory: Kan 0.5.5 through 0.6.0 Unauthenticated SSRF via /api/download/attatchment",
                    "tags": [
                        "third-party-advisory"
                    ],
                    "url": "https://www.vulncheck.com/advisories/kan-0.5.5-through-0.6.0-unauthenticated-ssrf-via-api-download-attatchment"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "leediay153 from Viettel Post",
                    "type": "finder"
                }
            ],
            "x_generator": {
                "engine": "vulncheck-endgame"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-16T16:46:50.369655Z",
                                "id": "CVE-2026-110628",
                                "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": "2026-10-16T17:16:01.554Z"
                }
            }
        ]
    }
}