CVE-2026-120308: gateway · A Beta9 tenant can attach a volume when deploying a function, endpoint, or task queue
Affects gatewaySource GCVE Database
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
Thin evidence
One scorer or none| CNA (JFROG) | CVSS 3.1 | 9.9 |
|---|
- 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:HExploitation evidence
Disclosed: evidence found.
CVE published 1 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
GitHubbeam-cloud/beta9/gatewaypkg:github/beam-cloud/beta9/gatewayOther threats | Affected
| Fixed in
|
GitHubbeam-cloud/beta9/workerpkg:github/beam-cloud/beta9/workerOther threats | Affected
| Fixed in
|
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
- nvd.nist.gov/vuln/detail/CVE-2026-120308 (opens in a new tab)
- github.com/beam-cloud/beta9/pull/1897 (opens in a new tab)
- github.com/beam-cloud/beta9/commit/a28bf12cf0007c792a25d8ed282b4e8bf6f30393 (opens in a new tab)
- github.com/beam-cloud/beta9 (opens in a new tab)
- github.com/beam-cloud/beta9/releases/tag/gateway-0.1.769 (opens in a new tab)
- github.com/beam-cloud/beta9/releases/tag/gateway-0.1.776 (opens in a new tab)
- github.com/beam-cloud/beta9/releases/tag/worker-0.1.745 (opens in a new tab)
- github.com/beam-cloud/beta9/releases/tag/worker-0.1.756 (opens in a new tab)