Title (in Estonian)

CVE-2026-4983 - Detaljid CVSS, EPSS ja CISA Kev | CVE Find

Summary (in Estonian)

Open VSX Registry ei sanitiseeri SVG-i failid, mis üles laaditakse veebidele kui eesti tarkvara. See lubab hoolikalt teha veebiarendusega eesti tarkvara extensiioni, mis sisaldab rikkuvat SVG-i ikooni ja saavutab salvestatud kross-saajatüki (XSS) kui kasutaja laadib ikooni URL-i.

What the vulnerability/exploit is about

Open VSX Registry ei sanitiseeri SVG-i failid, mis üles laaditakse veebidele kui eesti tarkvara. See lubab hoolikalt teha veebiarendusega eesti tarkvara extensiioni, mis sisaldab rikkuvat SVG-i ikooni ja saavutab salvestatud kross-saajatüki (XSS) kui kasutaja laadib ikooni URL-i.

Technical explanation for defenders

Open VSX Registry ei sanitiseeri SVG-i failid, mis üles laaditakse veebidele kui eesti tarkvara. See lubab hoolikalt teha veebiarendusega eesti tarkvara extensiioni, mis sisaldab rikkuvat SVG-i ikooni ja saavutab salvestatud kross-saajatüki (XSS) kui kasutaja laadib ikooni URL-i.

Safe educational code

# Import necessary libraries
import requests

def fetch_svg_icon(url):
    try:
        # Fetch the SVG icon from the URL
        response = requests.get(url)
        response.raise_for_status()  # Raise an error for bad responses
        return response.text
    except requests.exceptions.RequestException as e:
        print(f"Error fetching SVG icon: {e}")
        return None

def sanitize_svg_icon(svg_content):
    # Simple sanitization to remove potentially harmful tags
    sanitized_svg = svg_content.replace('<script>', '').replace('</script>', '')
    return sanitized_svg

# Example usage
svg_url = "https://example.com/icon.svg"
svg_content = fetch_svg_icon(svg_url)
if svg_content:
    sanitized_svg = sanitize_svg_icon(svg_content)
    print("Sanitized SVG content:")
    print(sanitized_svg)

Mitigation checklist

1. **Input Validation**: Ensure that all user inputs are validated and sanitized before being used in output.
2. **Content Security Policy (CSP)**: Implement a CSP policy to restrict the types of resources that can be loaded, including SVG files.
3. **Secure Storage**: Store SVG icons securely and use HTTPS to protect them during transmission.
4. **Regular Audits**: Conduct regular security audits to identify and address any potential vulnerabilities.

References

1. [CVE-2026-4983 - Detalle CVSS, EPSS y CISA Kev | CVE Find](https://www.cvefind.com/es/cve/CVE-2026-4983.html)
2. [NVD - CVE-2026-4983](https://nvd.nist.gov/vuln/detail/CVE-2026-4983)
3. [Common Vulnerabilities and Exposures (CVE)](https://cve.mitre.org/)
4. [CWE-1434: Insecure Setting of Generative AI/ML Model Inference Parameters](https://cwe.mitre.org/data/definitions/1434.html)
5. [CWE-1431: Driving Intermediate Cryptographic State/Results to Hardware Module Outputs](https://cwe.mitre.org/data/definitions/1431.html)
6. [CWE-1428: Reliance on HTTP instead of HTTPS](https://cwe.mitre.org/data/definitions/1428.html)
7. [CWE-1429: Missing Security-Relevant Feedback for Unexecuted Operations in Hardware Interface](https://cwe.mitre.org/data/definitions/1429.html)
8. [CWE-1427: Improper Neutralization of Input Used for LLM Prompting](https://cwe.mitre.org/data/definitions/1427.html)
9. [CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')](https://cve.mitre.org/data/definitions/79.html)

References

• Related reference: https://www.cve.org/CVERecord?id=CVE-2026-4983
• Related reference: https://cwe.mitre.org/data/definitions/79.html