--- title: "CVE-2026-120306: Beta9 - Privilege Escalation" description: "Beta9 worker < 0.1.756 contains a privilege escalation caused by Buildah RUN steps executing with shared namespaces and CAP_DAC_OVERRIDE, letting tenant users escalate privileges by accessing the worker container filesystem, exploit requires tenant workspace token." url: https://panop.io/threat-heartbeat/CVE-2026-120306/ --- # CVE-2026-120306 Beta9 - Privilege Escalation Beta9 worker < 0.1.756 contains a privilege escalation caused by Buildah RUN steps executing with shared namespaces and CAP\_DAC\_OVERRIDE, letting tenant users escalate privileges by accessing the worker container filesystem, exploit requires tenant workspace token. CVSS base score 9.9 /10 Critical CISA KEV Not listed Public exploit None known Authentication Required EPSS 0.36% chance of exploitation in 30 days [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-120306) ## Details Type Privilege Escalation Impact Privilege Escalation CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Published 1 November 2026 Updated 3 November 2026 Weakness [CWE-269](https://cwe.mitre.org/data/definitions/269.html) ## Vendor fix Update to worker version 0.1.756 or later. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-120306](https://nvd.nist.gov/vuln/detail/CVE-2026-120306) - [https://github.com/beam-cloud/beta9/releases/tag/worker-0.1.756](https://github.com/beam-cloud/beta9/releases/tag/worker-0.1.756) - [https://github.com/beam-cloud/beta9](https://github.com/beam-cloud/beta9) - [https://github.com/beam-cloud/beta9/commit/a28bf12cf0007c792a25d8ed282b4e8bf6f30393](https://github.com/beam-cloud/beta9/commit/a28bf12cf0007c792a25d8ed282b4e8bf6f30393) - [https://github.com/beam-cloud/beta9/pull/1897](https://github.com/beam-cloud/beta9/pull/1897) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)