Nuxt OG Image is vulnerable to reflected XSS via query parameter injection into HTML attributes
Date: 2026-03
Affected: npm/nuxt-og-image
Attack vector: rce
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2026-34405
CWE: CWE-79
CVSS: 6.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

**Product:** Nuxt OG Image **Version:** 6.1.2 **CWE-ID:** [CWE-79](https://cwe.mitre.org/data/definitions/79.html): Improper Neutralization of Input During Web Page Generation **Description:** Incorrect parsing of GET parameters leads to the possibility of HTML injection and JavaScript code injection. **Impact:** Client-Side JavaScript Execution **Exploitation condition:** An external user **Mitigation:** Correct the logic of parsing GET parameters and their subsequent implementation into the generated page. **Researcher:** Dmitry Prokhorov (Positive Technologies) ## Research During the analysis of the nuxt-og-image package, which is shipped with the nuxt-seo package, a zero‑day vulnerability was discovered. This research revealed that the image‑generation component by the URI: `/_og/d/` (and, in older versions, `/og-image/`) contains a vulnerability that allows injection of arbitrary attributes into the HTML page body. The vulnerability was reproduced using the standard configuration and the default templates. _Listing 1. The content of the configuration file `nuxt.config.ts`_ ``` export default defineNuxtConfig({ modules: ['nuxt-og-image'], devServer: { host: 'web-test.local', port: 3000 }, site: { url: 'http://web-test.local:3000', }, ogImage: { fonts: [ 'Inter:400', 'Inter:700' ], } }) ``` ## Vulnerability reproduction To demonstrate the proof‑of‑concept, follow the URI: `/_og/d/og.html?width=1000&height=1000&onmouseov


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