CVE-2026-120308 (GCVE-0-2026-120308)

Vulnerability from cvelistv5 – Published: 2026-11-01 12:51 – Updated: 2026-11-01 12:51
VLAI
Title
Beta9 host filesystem exposure via volume path traversal
Summary
A Beta9 tenant can attach a volume when deploying a function, endpoint, or task queue. The gateway builds the host path by joining the shared volumes root, the workspace name, and the volume identifier from the stub configuration. Nothing checks that the identifier names a volume that workspace owns. Parent-directory segments in the identifier collapse the joined path to the worker's filesystem root, and the worker bind-mounts that path into the sandbox read-write unless the volume was explicitly marked read-only. A tenant with a workspace token can therefore read and write the worker's files, including other tenants' volumes stored on that machine. Confirmed against gateway 0.1.769 and worker 0.1.745. Fixed in gateway 0.1.776 and worker 0.1.756: volume identifiers and mount paths are validated before a mount is built, including for stubs saved before the check existed, and the gateway rejects a volume that does not exist or is not owned by the workspace.
Severity
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-668 - Exposure of Resource to Wrong Sphere
Assigner
JFROG CNA under the mitre root
CNA scorecard B 76/100 over 66 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
beam-cloud Beta9 gateway Affected: 0 , < 0.1.776 (semver)
guessed Create a notification for this product.
beam-cloud Beta9 worker Affected: 0 , < 0.1.756 (semver)
guessed Create a notification for this product.
Credits
Natan Nehorai JFrog Security Research
Show details on NVD website
To clipboard 

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}



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