CVE-2026-55650 in Studio
Summary
by MITRE • 09/15/2026
Outerbase Studio is a lightweight browser-based database GUI supporting PostgreSQL, MySQL, and SQLite. In version 0.10.2 and earlier, TextComponent in src/components/chart/index.tsx renders unsanitized Text Widget content through dangerouslySetInnerHTML, allowing injected markup with script-capable event handlers to execute when the widget is displayed. Outerbase Cloud and its backend services were discontinued in 2025, and the current architecture uses local browser dashboard storage, so the impact is limited to local self-XSS. Authentication token theft, account takeover, and backend database access are not applicable to the current architecture. No fixed release is available as of this review.
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Analysis
by VulDB Data Team • 09/15/2026
The vulnerability identified in Outerbase Studio version 0.10.2 and earlier represents a classic Cross-Site Scripting flaw rooted in improper input validation and unsafe rendering practices within the application's frontend codebase. Specifically, the TextComponent located at src/components/chart/index.tsx utilizes React's dangerouslySetInnerHTML property to render content from text widgets without performing adequate sanitization or encoding of special characters. This architectural decision allows any markup embedded within the widget data to be interpreted directly by the browser as executable HTML and JavaScript rather than being treated as inert text, thereby bypassing standard security controls that rely on context-aware escaping mechanisms.
From a technical perspective, this flaw constitutes an instance of CWE-79, commonly known as Improper Neutralization of Input During Web Page Generation or Cross-site Scripting. The core issue lies in the failure to sanitize user-supplied data before injecting it into the DOM via innerHTML-like methods. When a text widget containing malicious script tags with event handlers such onerror or onload is displayed within the chart interface, the browser parses and executes these scripts immediately upon rendering. This execution occurs within the security context of the Outerbase Studio application, granting the injected code full access to cookies, local storage contents, session tokens if present in memory, and other sensitive client-side resources associated with the current browsing environment.
The operational impact of this vulnerability is significantly constrained by the specific deployment architecture of Outerbase Studio as described. Since the platform transitioned from a cloud-based model involving backend services to a purely local browser dashboard storage model, the attack surface for remote exploitation has been effectively neutralized. The absence of server-side processing means that an attacker cannot remotely inject payloads into other users' sessions through database manipulation or API endpoints. Consequently, this vulnerability is classified as a self-XSS scenario where successful exploitation requires direct interaction with the application by the victim user. An attacker must convince a target to input malicious code into a text widget and subsequently view it within the chart component for the script to execute.
Despite the limitation to local execution, the risk remains non-trivial due to the potential for social engineering attacks targeting users who may not be aware of self-XSS risks. If an authenticated session is active or if sensitive data such as database connection strings, API keys, or query results are stored in browser-local storage and accessible via JavaScript, a successful exploit could lead to information disclosure. While account takeover through remote token theft is not applicable given the current architecture's lack of persistent backend sessions for this specific component, local persistence attacks remain possible if attackers can manipulate local storage entries to alter application behavior or steal cached credentials that might be exposed during normal operation.
Mitigation strategies must focus on eliminating the use of dangerouslySetInnerHTML with unsanitized data within the React components responsible for rendering text widgets. The development team should implement a robust sanitization library such as DOMPurify before passing any user-generated content to innerHTML or its React equivalent variants. Alternatively, the application architecture could be refactored to render text content using standard JSX expressions which automatically escape HTML entities and prevent script execution. Until a patched release is available, users are advised to exercise extreme caution when interacting with custom widgets that accept free-form text input, avoiding any entry of untrusted or suspicious code snippets within the interface.