CVE-2026-34404

Product: Nuxt OG Image
Version: 6.1.2
CWE-ID: CWE-404: Improper Resource Shutdown or Release
Description: Failure to limit the length and width of the generated image results in a denial of service.
Impact: Denial of service
Exploitation condition: An external user
Mitigation: Implement a limitation on the width and length of the generated image.
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 Denial of Service (DoS) vulnerability. The issue arises because there is no restriction on the width and height parameters of the generated image. 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, a request should be sent with the increased width and height parameters. This will cause a delay and exhaust the server’s resources during image generation.

Listing 2. HTTP-request example

GET /_og/d/og.png?width=20000&height=20000 HTTP/1.1
Host: web-test.local:3000

Figure 1. HTTP-response: denial-of-service error

After sending a HTTP-request, the test server's memory was exhausted.

Figure 2. Video memory exhausted error

Credits

Researcher: Dmitry Prokhorov (Positive Technologies)

Crafted input forces the application to consume excessive CPU, memory, or other resources, degrading or denying service. Typical impact: denial of service.

Kodem intelligence

1. What is CVE-2026-34404? CVE-2026-34404 is a medium-severity uncontrolled resource consumption vulnerability in nuxt-og-image (npm), affecting versions < 6.2.5. It is fixed in 6.2.5. Crafted input forces the application to consume excessive CPU, memory, or other resources, degrading or denying service.
2. Which versions of nuxt-og-image are affected by CVE-2026-34404? nuxt-og-image (npm) versions < 6.2.5 is affected.
3. Is there a fix for CVE-2026-34404? Yes. CVE-2026-34404 is fixed in 6.2.5. Upgrade to this version or later.
4. Is CVE-2026-34404 exploitable, and should I be worried? Whether CVE-2026-34404 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
5. What actually determines whether CVE-2026-34404 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
6. How do I fix CVE-2026-34404? Upgrade nuxt-og-image to 6.2.5 or later.

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