CVE-2026-73626

A flaw was found in JupyterLab where a missing 'await' in the PyPIExtensionManager.install function could lead to an allowlist/blocklist enforcement gap. This vulnerability allows direct callers of install to bypass security checks, potentially enabling the installation of unauthorized extensions...

SUSE CVE-2026-73626

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 isinstallallowed coroutine to never execute, so the extension allowlist/blocklist check was not enforced for direct callers of install. The sto...

DEBIAN-CVE-2026-73626

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 isinstallallowed coroutine to never execute, so the extension allowlist/blocklist check was not enforced for direct callers of install. The sto...

CVE-2026-73626

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 isinstallallowed coroutine to never execute, so the extension allowlist/blocklist check was not enforced for direct callers of install. The sto...

UBUNTU-CVE-2026-73626

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 isinstallallowed coroutine to never execute, so the extension allowlist/blocklist check was not enforced for direct callers of install. The sto...

CVE-2026-73626

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 isinstallallowed coroutine to never execute, so the extension allowlist/blocklist check was not enforced for direct callers of install. The sto...

CVE-2026-73626 JupyterLab before 4.6.2 Authentication Bypass via PyPIExtensionManager

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 isinstallallowed coroutine to never execute, so the extension allowlist/blocklist check was not enforced for direct callers of install. The sto...

CVE-2026-73626 JupyterLab before 4.6.2 Authentication Bypass via PyPIExtensionManager

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 isinstallallowed coroutine to never execute, so the extension allowlist/blocklist check was not enforced for direct callers of install. The sto...

CVE-2026-73626

CVE-2026-73626 is a HIGH severity (CVSS 3.1: 7.5) vulnerability in JupyterLab versions >=4.6.0, <=4.6.1 and

CVE-2026-73626 JupyterLab before 4.6.2 Authentication Bypass via PyPIExtensionManager

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 isinstallallowed coroutine to never execute, so the extension allowlist/blocklist check was not enforced for direct callers of install. The sto...

CVE-2026-73626

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 isinstallallowed coroutine to never execute, so the extension allowlist/blocklist check was not enforced for direct callers of install. The sto...

EUVD-2026-57795

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 isinstallallowed coroutine to never execute, so the extension allowlist/blocklist check was not enforced for direct callers of install. The sto...

GHSA-WHVH-WF3X-G77J JupyterLab: Allowlist/blocklist check in `PyPIExtensionManager.install()` not enforced for direct callers (missing `await`)

The extension allowlist/blocklist check inside PyPIExtensionManager.install was not enforced due to a missing await. For purposes of JupyterLab this was a secondary defense-in-depth check: install was intended to enforce the allowlist/blocklist itself for any future uses and users calling this...