CVE-2026-55650: Outerbase Studio Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-wwf9-7jrc-rv4q
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CVSS 4.4
CWE-79
Published
Advisory Summary

CVE-2026-55650 is a MODERATE (CVSS 4.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Outerbase Studio libraries in the npm ecosystem. The issue involves stored xss in text widget leads to authentication token exposure. Remediation is available in the latest vendor maintenance releases.

CVE-2026-55650 at a Glance

CVE Identifier CVE-2026-55650
GHSA Identifier GHSA-wwf9-7jrc-rv4q
Severity MODERATE
CVSS v3.1 Base Score 4.4
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Outerbase Studio
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 4.4

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

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

How to Fix CVE-2026-55650

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

@outerbase/studio fixed: Latest secure release 
npm install @outerbase/studio@Latest secure release
Verify Direct and Transitive Dependencies

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

npm ls @outerbase/studio

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-55650, inspect your project dependencies using npm:

npm ls @outerbase/studio

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

Note: The npm ls @outerbase/studio command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Outerbase Studio, 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 Stored Cross-Site Scripting (XSS) issue previously existed in the Text Widget in Board of Outerbase Studio where unsanitized HTML could be rendered using `dangerouslySetInnerHTML` ### Steps to Reproduce 1. Create a new dashboard. 2. Add a **Text widget**. 3. Insert the following payload: ```html <img src=x onerror="alert('XSS Executed\nToken: ' + localStorage.getItem('ob-token'))"> ``` ### Architectural Context Outerbase Cloud and its backend services were discontinued in 2025. The current version of Outerbase Studio operates purely as a client-side application, with dashboard data stored locally in the browser. ### Impact In the current architecture, the impact is limited to local self-XSS within a user's browser session. The previously described scenarios involving: - authentication token theft - account takeover - database access are no longer applicable since there are no active backend services or authentication tokens. ### Remediation The unsafe HTML rendering in the Text Widget has been removed in commit https://github.com/outerbase/studio/commit/b06fb85e5967440278d5a815721b360920566ab9 by eliminating the use of dangerouslySetInnerHTML.

CVE-2026-55650 Affected Outerbase Studio Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
@outerbase/studio
npm/@outerbase/studio
npm
≤ 0.10.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/outerbase/studio/security/advisories/GHSA-wwf9-7jrc-rv4q
Security Fix Commit FIX COMMIT
https://github.com/outerbase/studio/commit/b06fb85e5967440278d5a815721b360920566ab9
Outerbase Studio Source Repository REPOSITORY
https://github.com/outerbase/studio

Frequently Asked Questions

What is CVE-2026-55650?
CVE-2026-55650 is a security vulnerability in Outerbase Studio involving Stored XSS in Text Widget Leads to Authentication Token Exposure under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Outerbase Studio versions are affected?
Affected versions include releases prior to current release patches across affected packages: @outerbase/studio.
What version fixes CVE-2026-55650?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is @outerbase/studio affected?
Yes, @outerbase/studio is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-55650?
CVE-2026-55650 has a CVSS v3.1 base score of 4.4 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2026-55650?
CVE-2026-55650 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check npm dependencies for CVE-2026-55650?
Run the dependency tree command: 'npm ls @outerbase/studio'. 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-wwf9-7jrc-rv4q",
  "modified" : "2026-06-19T21:18:44Z",
  "published" : "2026-06-19T21:18:44Z",
  "aliases" : [ "CVE-2026-55650" ],
  "summary" : "Outerbase Studio: Stored XSS in Text Widget Leads to Authentication Token Exposure",
  "details" : "## Summary\n\nA Stored Cross-Site Scripting (XSS) issue previously existed in the Text Widget in Board of Outerbase Studio where unsanitized HTML could be rendered using `dangerouslySetInnerHTML`\n\n### Steps to Reproduce\n\n1. Create a new dashboard.\n2. Add a **Text widget**.\n3. Insert the following payload:\n\n```html\n<img src=x onerror=\"alert('XSS Executed\\nToken: ' + localStorage.getItem('ob-token'))\">\n```\n\n### Architectural Context\n\nOuterbase Cloud and its backend services were discontinued in 2025.\n\nThe current version of Outerbase Studio operates purely as a client-side application, with dashboard data stored locally in the browser.\n\n### Impact\n\nIn the current architecture, the impact is limited to local self-XSS within a user's browser session.\nThe previously described scenarios involving:\n\n- authentication token theft\n- account takeover\n- database access\n\nare no longer applicable since there are no active backend services or authentication tokens.\n\n### Remediation\n\nThe unsafe HTML rendering in the Text Widget has been removed in commit https://github.com/outerbase/studio/commit/b06fb85e5967440278d5a815721b360920566ab9 by eliminating the use of dangerouslySetInnerHTML.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@outerbase/studio"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.10.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/outerbase/studio/security/advisories/GHSA-wwf9-7jrc-rv4q"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/outerbase/studio/commit/b06fb85e5967440278d5a815721b360920566ab9"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/outerbase/studio"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-19T21:18:44Z",
    "nvd_published_at" : null
  }
}