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    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-85181",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-09-03T11:08:17.527Z",
        "datePublished": "2026-09-03T14:12:19.751Z",
        "dateUpdated": "2026-09-24T14:20:49.811Z"
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                "dateUpdated": "2026-09-24T14:20:49.811Z"
            },
            "datePublic": "2026-07-05T00:00:00.000Z",
            "title": "CAT through 3.1.0 Session Cookie Forgery via Unkeyed hashCode Checksum",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "CAT uses Java String.hashCode as the sole integrity check for session cookies without server-side keying, allowing attackers to forge valid checksums offline. Attackers can set the x-forwarded-for header to bypass IP binding validation and create admin sessions with full configuration access."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Reliance on Cookies without Validation and Integrity Checking",
                            "cweId": "CWE-565",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "dianping",
                    "product": "cat",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:maven/com.dianping.cat/parent",
                    "versions": [
                        {
                            "version": "0",
                            "lessThanOrEqual": "3.1.0",
                            "status": "affected",
                            "versionType": "semver"
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                    ]
                }
            ],
            "metrics": [
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                        "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"
                    }
                },
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                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "availabilityImpact": "HIGH",
                        "baseScore": 9.8,
                        "baseSeverity": "CRITICAL"
                    }
                }
            ],
            "references": [
                {
                    "url": "https://github.com/dianping/cat/issues/2384",
                    "tags": [
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                    ],
                    "name": "GitHub Issue #2384"
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                {
                    "url": "https://github.com/dianping/cat",
                    "tags": [
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                },
                {
                    "url": "https://github.com/dianping/cat/blob/3.1.0/cat-home/src/main/java/com/dianping/cat/system/page/login/service/TokenBuilder.java",
                    "tags": [
                        "technical-description"
                    ],
                    "name": "TokenBuilder.java at 3.1.0"
                },
                {
                    "url": "https://github.com/dianping/cat/blob/3.1.0/cat-home/src/main/java/com/dianping/cat/util/HttpUtils.java",
                    "tags": [
                        "technical-description"
                    ],
                    "name": "HttpUtils.java at 3.1.0"
                },
                {
                    "name": "VulnCheck Advisory: CAT through 3.1.0 Session Cookie Forgery via Unkeyed hashCode Checksum",
                    "tags": [
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                    "url": "https://www.vulncheck.com/advisories/cat-through-3.1.0-session-cookie-forgery-via-unkeyed-hashcode-checksum"
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            "credits": [
                {
                    "lang": "en",
                    "value": "George Chen",
                    "type": "finder"
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            ],
            "x_generator": {
                "engine": "vulncheck-endgame"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-03T15:03:39.933775Z",
                                "id": "CVE-2026-85181",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
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                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
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                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-03T17:23:25.045Z"
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}