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VulnerabilityPublished

CVE-2026-120308: gateway · A Beta9 tenant can attach a volume when deploying a function, endpoint, or task queue

Affects gatewaySource GCVE Database

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Authoritative record:CVE-2026-120308· Critical 9.9

Not known to be exploited · CVSS 9.9 Critical · fixed in 0.1.776 : patch gateway as a priority.

Data as of 1 Nov 2026, 16:30 UTC

CVSS 3.1 base score
9.9Critical
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (JFROG)CVSS 3.19.9
Patch
Available – fixed in 0.1.776, 0.1.756
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 1 Nov 2026.

What to do

Upgrade beam-cloud/beta9/gateway to 0.1.776; beam-cloud/beta9/worker to 0.1.756.

Affected software

ProductAffectedFixed in
GitHubbeam-cloud/beta9/gatewaypkg:github/beam-cloud/beta9/gatewayOther threatsAffected
  • <0.1.776 >=0.1.769
Fixed in
  • 0.1.776
GitHubbeam-cloud/beta9/workerpkg:github/beam-cloud/beta9/workerOther threatsAffected
  • <0.1.756 >=0.1.745
Fixed in
  • 0.1.756

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

This vulnerability has been fixed in gateway version 0.1.776 and worker version 0.1.756. Users should upgrade to these versions or later to ensure volume identifiers and mount paths are properly validated and unauthorized mounts are rejected. No additional mitigation is required once these versions are deployed.

Description

CVE-2026-120308 is a critical vulnerability affecting Beta9 tenants who can attach arbitrary volumes when deploying functions, endpoints, or task queues. The issue arises because the gateway improperly constructs host paths for volume mounts without validating ownership or path traversal, allowing tenants to access and modify files outside their workspace, including other tenants' data. This vulnerability was confirmed in gateway version 0.1.769 and worker version 0.1.745 and fixed in gateway 0.1.776 and worker 0.1.756 by adding validation of volume identifiers and mount paths.

References

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