SB2026110847 - Multiple vulnerabilities in rails-html-sanitizer

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Main Vulnerability Database SB2026110847

SB2026110847 - Multiple vulnerabilities in rails-html-sanitizer

Published: November 8, 2026

Security Bulletin ID SB2026110847
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Cross-site scripting (CVE-ID: CVE-2026-73648)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]


The vulnerability allows an unauthenticated attacker to execute scripts in a victim's browser in the context of a sanitized document.

The vulnerability exists due to rails-html-sanitizer restricting SVG references through xlink:href but not plain href when applications override allowed tags to include use. An unauthenticated attacker can supply a use element referencing a same-origin SVG document containing scripts, which may execute when a victim views the sanitized content.


Remediation

Install update from vendor's website.

References