CVE-2026-54324: Daytona Cross-tenant Data Leak Vulnerability

MODERATE
Advisory Identifier: GHSA-qwxf-2m7m-2m3x
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CVSS 6.5
CWE-639 CWE-863
Published
Advisory Summary

CVE-2026-54324 is a MODERATE (CVSS 6.5) cross-tenant data leak vulnerability (CWE-639: Authorization Bypass Through User-Controlled Key) affecting Daytona libraries in the Go ecosystem. The issue involves cross-tenant data leak in notification websocket gateway via unverified organizationid join. Remediation is available by upgrading affected packages to version 0.185.0.

CVE-2026-54324 at a Glance

CVE Identifier CVE-2026-54324
GHSA Identifier GHSA-qwxf-2m7m-2m3x
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-639: Authorization Bypass Through User-Controlled Key
Affected Product Daytona
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-54324

To remediate this vulnerability, upgrade all affected Daytona dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/daytonaio/daytona fixed: 0.185.0 
Upgrade github.com/daytonaio/daytona to 0.185.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/daytonaio/daytona

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-54324, inspect your project dependencies for Daytona:

inspect dependencies for github.com/daytonaio/daytona

Analyze the terminal output to locate any version of Daytona in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.185.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-639: Authorization Bypass Through User-Controlled Key, where the system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. In Daytona, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary A cross-tenant authorization flaw in Daytona's notification WebSocket gateway allowed any authenticated user to subscribe to another organization's realtime notification channel and passively receive that organization's events. ### Impact The notification gateway's JWT handshake joined a client-supplied organization identifier to the corresponding notification room without verifying that the authenticated user was a member of that organization. As a result, an authenticated user could receive another organization's realtime sandbox, snapshot, volume, and runner events, including data carried in those events. This is a cross-tenant confidentiality break. It required a valid account and knowledge of the target organization id (a non-secret UUID); no elevated privileges were needed. The API-key authentication path was not affected. The affected component is the Daytona API service (the `apps/api` NestJS application). It is distributed through Daytona's repository releases and container images for self-hosted deployments; it is not published as a Go or npm package, so the advisory will not surface through `go get` or npm dependency tooling. ### Affected Versions >= 0.101.0, <= 0.184.0 ### Patched Versions 0.185.0 ### Credit @vnth4nhnt from CyStack

CVE-2026-54324 Affected Daytona Versions

1 component(s)
Fixed Versions:
0.185.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/daytonaio/daytona
golang/github.com/daytonaio/daytona
Go
< 0.185.0
0.185.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/daytonaio/daytona/security/advisories/GHSA-qwxf-2m7m-2m3x
NVD — CVE-2026-54324 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-54324
Daytona Source Repository REPOSITORY
https://github.com/daytonaio/daytona

Frequently Asked Questions

What is CVE-2026-54324?
CVE-2026-54324 is a security vulnerability in Daytona involving Cross-tenant data leak in notification WebSocket gateway via unverified organizationId join under CWE-639: Authorization Bypass Through User-Controlled Key.
Which Daytona versions are affected?
Affected versions include releases prior to 0.185.0 across affected packages: github.com/daytonaio/daytona.
What version fixes CVE-2026-54324?
Upgrading to 0.185.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/daytonaio/daytona affected?
Yes, github.com/daytonaio/daytona is affected in releases prior to 0.185.0. Upgrade your dependency to 0.185.0 or later.
What is the CVSS score of CVE-2026-54324?
CVE-2026-54324 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-54324?
CVE-2026-54324 is classified under CWE-639: Authorization Bypass Through User-Controlled Key (The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.).
How can I check Go dependencies for CVE-2026-54324?
Run the dependency tree command: 'inspect dependencies for github.com/daytonaio/daytona'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qwxf-2m7m-2m3x",
  "modified" : "2026-07-20T21:10:57Z",
  "published" : "2026-06-17T18:07:30Z",
  "aliases" : [ "CVE-2026-54324" ],
  "summary" : "Daytona: Cross-tenant data leak in notification WebSocket gateway via unverified organizationId join",
  "details" : "### Summary\nA cross-tenant authorization flaw in Daytona's notification WebSocket gateway allowed any authenticated user to subscribe to another organization's realtime notification channel and passively receive that organization's events.\n\n### Impact\nThe notification gateway's JWT handshake joined a client-supplied organization identifier to the corresponding notification room without verifying that the authenticated user was a member of that organization. As a result, an authenticated user could receive another organization's realtime sandbox, snapshot, volume, and runner events, including data carried in those events. This is a cross-tenant confidentiality break. It required a valid account and knowledge of the target organization id (a non-secret UUID); no elevated privileges were needed. The API-key authentication path was not affected.\n\nThe affected component is the Daytona API service (the `apps/api` NestJS application). It is distributed through Daytona's repository releases and container images for self-hosted deployments; it is not published as a Go or npm package, so the advisory will not surface through `go get` or npm dependency tooling.\n\n### Affected Versions\n>= 0.101.0, <= 0.184.0\n\n### Patched Versions\n0.185.0\n\n### Credit\n@vnth4nhnt from CyStack",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/daytonaio/daytona"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.185.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.184.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/daytonaio/daytona/security/advisories/GHSA-qwxf-2m7m-2m3x"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-54324"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/daytonaio/daytona"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-639", "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-17T18:07:30Z",
    "nvd_published_at" : "2026-06-23T18:18:09Z"
  }
}