{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-44300",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-05-05T17:39:31.113Z",
        "datePublished": "2026-09-15T17:08:15.845Z",
        "dateUpdated": "2026-09-15T19:45:01.536Z"
    },
    "containers": {
        "cna": {
            "title": "OpenCost ServiceKey Endpoint Unauthorized Credential Overwrite/Injection",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-20",
                            "lang": "en",
                            "description": "CWE-20: Improper Input Validation",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-309",
                            "lang": "en",
                            "description": "CWE-309: Use of Password System for Primary Authentication",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/opencost/opencost/security/advisories/GHSA-wmj8-9953-vff5",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/opencost/opencost/security/advisories/GHSA-wmj8-9953-vff5"
                },
                {
                    "name": "https://github.com/opencost/opencost/pull/3651",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/opencost/opencost/pull/3651"
                },
                {
                    "name": "https://github.com/opencost/opencost/pull/3910",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/opencost/opencost/pull/3910"
                },
                {
                    "name": "https://github.com/opencost/opencost/commit/69430e7f627b3e62c8999312c06949267fab813a",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/opencost/opencost/commit/69430e7f627b3e62c8999312c06949267fab813a"
                },
                {
                    "name": "https://github.com/opencost/opencost/commit/a49a25bc2e0d6e220a131a4dc58f38ebe6ae851b",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/opencost/opencost/commit/a49a25bc2e0d6e220a131a4dc58f38ebe6ae851b"
                },
                {
                    "name": "https://github.com/opencost/opencost/releases/tag/v1.120.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/opencost/opencost/releases/tag/v1.120.0"
                },
                {
                    "name": "https://github.com/opencost/opencost/releases/tag/v1.121.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/opencost/opencost/releases/tag/v1.121.0"
                }
            ],
            "affected": [
                {
                    "vendor": "opencost",
                    "product": "opencost",
                    "versions": [
                        {
                            "version": "< 1.121.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-15T17:08:15.845Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "OpenCost provides cost monitoring for Kubernetes workloads and cloud costs. Prior to 1.121.0, the POST /serviceKey endpoint in pkg/costmodel/router.go allows a network client to invoke AddServiceKey without mandatory authentication and submit an arbitrary key form value that is written to the GCP service-account key.json file returned by GetGCPAuthSecretFilePath in core/pkg/env/core.go. The attacker controls the file contents but not the CONFIG_PATH-derived directory, the key.json filename, or the file mode. Replacing the credential contents can disrupt GCP cost collection or cause OpenCost to use attacker-selected credentials, and the wildcard Access-Control-Allow-Origin response permits browser-assisted requests when the service is reachable from a browser. This issue is fixed in version 1.121.0."
                }
            ],
            "source": {
                "advisory": "GHSA-wmj8-9953-vff5",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-15T19:16:35.644735Z",
                                "id": "CVE-2026-44300",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-15T19:45:01.536Z"
                }
            }
        ]
    }
}