CVE-2026-113657
Description
A flaw was found in sanitize-html. This vulnerability allows a remote attacker to achieve arbitrary script execution when an application is configured to permit namespace-prefixed Scalable Vector Graphics (SVG) animation elements. By submitting specially crafted SVG markup, an attacker can bypass URL validation checks and rewrite link destinations to unsafe addresses. When a user activates the affected link, malicious script executes within their browser session.
Statement
This vulnerability is rated as Low impact for Red Hat products because triggering the flaw requires non-default, permissive sanitization policies that explicitly allow SVG animation markup and attributes. Exploitation additionally relies on user interaction, requiring a victim to click a maliciously manipulated link after rendering. Under default configurations in Red Hat services and management interfaces, these permissive rules are not enabled, preventing untrusted SMIL elements from bypassing sanitization.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 3.7 | N/A | 3.7 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | High | N/A | High |
| Privileges Required | Low | N/A | Low |
| User Interaction | Required | N/A | Required |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | Low | N/A | Low |
| Integrity Impact | Low | N/A | Low |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
cve.org: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
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