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    "cveMetadata": {
        "cveId": "CVE-2026-73626",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-08-13T11:17:25.160Z",
        "datePublished": "2026-08-13T11:28:25.551Z",
        "dateUpdated": "2026-08-28T13:45:55.401Z"
    },
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                "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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                "dateUpdated": "2026-08-28T13:45:55.401Z"
            },
            "datePublic": "2026-07-21T00:00:00.000Z",
            "title": "JupyterLab before 4.6.2 Authentication Bypass via PyPIExtensionManager",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "JupyterLab versions >=4.6.0,<=4.6.1 and <=4.5.9 contain an allowlist/blocklist enforcement gap in PyPIExtensionManager.install(). A missing 'await' caused the is_install_allowed coroutine to never execute, so the extension allowlist/blocklist check was not enforced for direct callers of install(). The stock JupyterLab HTTP API and Extension Manager UI are not affected, as they perform a separate, correctly awaited check. The issue affects only deployments where a custom extension or downstream integration imports PyPIExtensionManager and calls install() directly with a package name influenced by untrusted input, an allowlist/blocklist is configured, the PyPI Extension Manager is enabled, and kernels and terminals are disabled or delegated to remote hosts. Fixed in JupyterLab 4.6.2 and 4.5.10."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Improper Access Control",
                            "cweId": "CWE-284",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "jupyterlab",
                    "product": "jupyterlab",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:pypi/jupyterlab",
                    "versions": [
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                            "version": "4.6.0",
                            "status": "affected",
                            "versionType": "semver",
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                            "version": "4.6.1",
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                    "packageURL": "pkg:pypi/jupyterlab",
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                            "version": "0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "4.5.10"
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                            "version": "4.5.10",
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                            "versionType": "semver"
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                            "operator": "OR",
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                                    "versionEndExcluding": "4.6.1"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:jupyter:jupyterlab:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "4.5.10"
                                }
                            ]
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                    ]
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "cvssV4_0": {
                        "version": "4.0",
                        "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                        "attackVector": "NETWORK",
                        "attackComplexity": "HIGH",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
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            "references": [
                {
                    "url": "https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-whvh-wf3x-g77j",
                    "tags": [
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                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "de3erve-hunter",
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                },
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                    "lang": "en",
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            "x_generator": {
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        "adp": [
            {
                "metrics": [
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                            "type": "ssvc",
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                                "timestamp": "2026-08-13T12:57:37.438667Z",
                                "id": "CVE-2026-73626",
                                "options": [
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                                        "Exploitation": "none"
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                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                "title": "CISA ADP Vulnrichment",
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