{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-82271",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-08-28T11:12:38.809Z",
        "datePublished": "2026-08-28T16:18:54.164Z",
        "dateUpdated": "2026-08-28T16:18:54.164Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
                "shortName": "VulnCheck",
                "dateUpdated": "2026-08-28T16:18:54.164Z"
            },
            "datePublic": "2026-06-02T00:00:00.000Z",
            "title": "R2R Missing Ownership Check Allows Modifying Other Users' Conversations",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "R2R through 3.6.5 fails to properly validate user ownership in conversation update and message handlers, allowing authenticated users to modify other users' conversations. Attackers can supply arbitrary conversation identifiers to rename conversations and append messages to other users' conversation histories, corrupting state and injecting malicious content."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Authorization Bypass Through User-Controlled Key",
                            "cweId": "CWE-639",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "SciPhi-AI",
                    "product": "R2R",
                    "versions": [
                        {
                            "version": "0",
                            "lessThanOrEqual": "3.6.5",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected",
                    "packageName": "r2r"
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "cvssV4_0": {
                        "version": "4.0",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 7.1,
                        "baseSeverity": "HIGH"
                    }
                },
                {
                    "format": "CVSS",
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "HIGH",
                        "availabilityImpact": "NONE",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM"
                    }
                }
            ],
            "references": [
                {
                    "url": "https://github.com/SciPhi-AI/R2R/issues/2292",
                    "tags": [
                        "issue-tracking"
                    ],
                    "name": "GitHub Issue #2292"
                },
                {
                    "url": "https://github.com/SciPhi-AI/R2R",
                    "tags": [
                        "product"
                    ]
                },
                {
                    "url": "https://github.com/SciPhi-AI/R2R/blob/9c5a94d151f90876bd7eb860f300a8fd662dc481/py/core/main/api/v3/conversations_router.py",
                    "tags": [
                        "technical-description"
                    ],
                    "name": "Vulnerable code: conversations_router.py"
                },
                {
                    "name": "VulnCheck Advisory: R2R Missing Ownership Check Allows Modifying Other Users' Conversations",
                    "tags": [
                        "third-party-advisory"
                    ],
                    "url": "https://www.vulncheck.com/advisories/r2r-missing-ownership-check-allows-modifying-other-users-conversations"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "George Chen",
                    "type": "reporter"
                }
            ],
            "x_generator": {
                "engine": "vulncheck-endgame"
            }
        }
    }
}