CVE-2026-117539
Deferred Deferred - Pending Action

SVG Sanitizer CSS Injection and Remote Reference Bypass

Publication date: 2026-10-27

Last updated on: 2026-10-27

Assigner: VulnCheck

Description
darylldoyle svg-sanitizer before 1.0.0 contains CSS injection and remote reference bypass vulnerabilities that allow attackers to embed external resources by uploading crafted SVG files. Attackers can use unsanitized style content, unquoted url() values, or image href attributes to exfiltrate page data, track users, or disclose visitor IP addresses.

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Meta Information

Published
2026-10-27
Last Modified
2026-10-27
Generated
2026-10-27
AI Q&A
2026-10-27
EPSS Evaluated
N/A
NVD
CVE-2026-117539
EUVD
EUVD-2026-110804

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
darylldoyle svg-sanitizer 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This vulnerability affects darylldoyle svg-sanitizer versions before 1.0.0. It allows CSS injection and remote reference bypass through crafted SVG files. Attackers can embed external resources using unsanitized style content, unquoted url() values, or image href attributes. This can lead to data exfiltration, user tracking, or IP address disclosure.

Detection Guidance

To detect this vulnerability, inspect SVG files for unsanitized style content, unquoted url() values, or image href attributes pointing to external resources. Check library versions of darylldoyle svg-sanitizer for versions before 1.0.0. Use commands like 'composer show enshrined/svg-sanitize' to verify installed versions.

Impact Analysis

Exploitation can result in data theft, user tracking, or exposure of visitor IP addresses. Attackers may exfiltrate sensitive page data, track user activity, or load external resources without proper sanitization. The impact depends on the context of SVG file usage in your application.

Mitigation Strategies

Upgrade darylldoyle svg-sanitizer to version 1.0.0 or later. Review SVG file handling in applications using the library. Implement additional input validation for SVG files to block external resource references. Monitor for unusual network activity from SVG processing.

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