What is CVE-2026-73192?

CVE-2026-73192 is a medium-severity vulnerability in Apache Sling Xss Protection API, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-09-23.

How severe is CVE-2026-73192?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Apache Sling Xss Protection API

CVE-2026-73192

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

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-09-23 · last modified 2026-09-30.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.4th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.002

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

sling.apache.org/news.html (vendor-advisory, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-73192?: CVE-2026-73192 is a medium-severity vulnerability in Apache Sling Xss Protection API, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-09-23.
How severe is CVE-2026-73192?: Medium severity. CVSS v3 base score is 6.1 out of 10.