What’s Vulnerable › Vulnerabilities

CVE-2026-73192: Apache Sling XSS: XSS possible through XSSAPI.getValidHref()

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-23 · updated 2026-09-30
• Weakness: CWE-79

Description

An improper neutralization of input during web page generation ('Cross-site Scripting') [CWE-79] vulnerability when using the XSSAPI.getValidHref() in Apache Sling XSS version 2.4.10 and prior may allow an attacker to perform a reflected cross-site scripting (XSS) attack in every feature using this method. In order to successfully attack an application, the attacker needs to be able to submit a value which is not correctly sanitized by that library. Upgrade to Apache Sling XSS >= 2.4.12

Affected products

• Apache Software Foundation Apache Sling XSS: before 2.4.12 — fixed in 2.4.12

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Sling XSS 2.4.12. Check the vendor advisory for mitigations.

References

• https://sling.apache.org/news.html
• http://www.openwall.com/lists/oss-security/2026/09/23/18

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