{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-42266", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-26T11:53:27.706Z", "datePublished": "2026-05-13T15:08:49.846Z", "dateUpdated": "2026-08-28T12:04:22.624Z" }, "containers": { "cna": { "title": "JupyterLab has an Extension Manager API/GUI Policy Discrepancy allowing 3rd party (malicious) extensions install via POST request.", "problemTypes": [ { "descriptions": [ { "cweId": "CWE-88", "lang": "en", "description": "CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')", "type": "CWE" } ] }, { "descriptions": [ { "cweId": "CWE-602", "lang": "en", "description": "CWE-602: Client-Side Enforcement of Server-Side Security", "type": "CWE" } ] } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" } } ], "references": [ { "name": "https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-37w4-hwhx-4rc4", "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-37w4-hwhx-4rc4" }, { "name": "https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.7", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.7" }, { "name": "https://jupyterhub.readthedocs.io/en/5.2.1/explanation/websecurity.html", "tags": [ "x_refsource_MISC" ], "url": "https://jupyterhub.readthedocs.io/en/5.2.1/explanation/websecurity.html" }, { "name": "https://jupyterlab.readthedocs.io/en/latest/user/extensions.html#extension-manager-implementations", "tags": [ "x_refsource_MISC" ], "url": "https://jupyterlab.readthedocs.io/en/latest/user/extensions.html#extension-manager-implementations" } ], "affected": [ { "vendor": "jupyterlab", "product": "jupyterlab", "versions": [ { "version": ">= 4.0.0, < 4.5.7", "status": "affected" } ] } ], "providerMetadata": { "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-21T00:41:24.140Z" }, "descriptions": [ { "lang": "en", "value": "JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.0.0 to 4.5.6, the allow-list of extensions that can be installed from PyPI Extension Manager (allowed_extensions_uris) is not correctly enforced by JupyterLab. The PyPI Extension Manager was not contained to packages listed on the default PyPI index. This vulnerability is fixed in 4.5.7." } ], "source": { "advisory": "GHSA-37w4-hwhx-4rc4", "discovery": "UNKNOWN" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-05-13T00:00:00+00:00", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-42266" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-14T03:56:38.179Z" } }, { "affected": [ { "collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": [ "cpe:/a:redhat:migration_toolkit_applications:8.2::el9" ], "defaultStatus": "affected", "packageName": "mta/mta-solution-server-rhel9", "product": "Red Hat Migration Toolkit for Applications 8.2", "vendor": "Red Hat", "versions": [ { "lessThan": "*", "status": "unaffected", "version": "1784109883", "versionType": "rpm" } ] }, { "collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": [ "cpe:/a:redhat:openshift_ai:3.4::el9" ], "defaultStatus": "affected", "packageName": "rhoai/odh-th06-cpu-torch210-py312-rhel9", "product": "Red Hat OpenShift AI 3.4", "vendor": "Red Hat", "versions": [ { "lessThan": "*", "status": "unaffected", "version": "1787076778", "versionType": "rpm" } ] }, { "collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": [ "cpe:/a:redhat:openshift_ai:3.4::el9" ], "defaultStatus": "affected", "packageName": "rhoai/odh-th06-cuda130-torch210-py312-rhel9", "product": "Red Hat OpenShift AI 3.4", "vendor": "Red Hat", "versions": [ { "lessThan": "*", "status": "unaffected", "version": "1787077779", "versionType": "rpm" } ] }, { "collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": [ "cpe:/a:redhat:openshift_ai:3.4::el9" ], "defaultStatus": "affected", "packageName": "rhoai/odh-th06-rocm64-torch291-py312-rhel9", "product": "Red 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OpenShift AI (RHOAI)", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:openshift_ai" ], "defaultStatus": "unaffected", "packageName": "rhoai/odh-th06-cuda130-torch291-py312-rhel9", "product": "Red Hat OpenShift AI (RHOAI)", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:openshift_ai" ], "defaultStatus": "affected", "packageName": "rhoai/odh-workbench-jupyter-pytorch-llmcompressor-cuda-py312-rhel9", "product": "Red Hat OpenShift AI (RHOAI)", "vendor": "Red Hat" } ], "datePublic": "2026-05-13T15:08:49.846Z", "descriptions": [ { "lang": "en", "value": "A flaw was found in JupyterLab, an extensible environment for interactive computing. The PyPI Extension Manager, responsible for installing extensions, failed to properly enforce its allow-list of approved extensions. This vulnerability allowed for the installation of unauthorized extensions from sources outside the default PyPI index. Exploitation of this flaw could lead to arbitrary code execution and significant system compromise." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-88", "description": "Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2026-42266" }, { "name": "RHBZ#2477072", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477072" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42266.json" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:43038" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:60520" } ], "solutions": [ { "lang": "en", "value": "RHSA-2026:43038: Red Hat Migration Toolkit for Applications 8.2" }, { "lang": "en", "value": "RHSA-2026:60520: Red Hat OpenShift AI 3.4" } ], "timeline": [ { "lang": "en", "time": "2026-05-13T16:02:13.807Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-05-13T15:08:49.846Z", "value": "Made public." } ], "title": "jupyterlab: JupyterLab: Arbitrary code execution due to improper enforcement of extension allow-list", "workarounds": [ { "lang": "en", "value": "Upgrade JupyterLab to version 4.5.7 or later.\n\nSet the JupyterLab extension manager to read-only mode to prevent users from installing unauthorized extensions. Note: configuring a PyPI proxy with an allow list of packages is not sufficient to protect against this vulnerability." } ], "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-08-28T12:04:22.624Z" } } ] } }