CVE-2026-73192: Apache Sling XSS reflected XSS in getValidHref()

CVE-2026-73192 · Severity: medium · CVSS 6.1 · Published 2026-09-23

Apache Sling XSS is a library that sanitizes user input to prevent cross-site scripting attacks in web applications. A flaw in the getValidHref() method fails to properly neutralize malicious input, allowing an attacker to inject and execute arbitrary JavaScript code in a user's browser when the library is used in an application. An attacker needs to submit an unsanitized value through an application that uses this vulnerable method to exploit the flaw.

Technologies: Apache Sling XSS. Vendors: Apache.

Quick answers

Is CVE-2026-73192 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-73192 being exploited in the wild.
How severe is CVE-2026-73192?
Medium severity, with a CVSS score of 6.1, published 23 September 2026.
Which products and versions are affected?
Apache Sling XSS 2.4.10 and prior.
Is there a fix for CVE-2026-73192?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-73192 attacked?
It is attacked over the network.
Am I affected by CVE-2026-73192?
Check whether you run Apache Sling XSS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is an improper input neutralization (CWE-79) in the XSSAPI.getValidHref() method that permits reflected XSS attacks. The flaw requires attacker-controlled input to be passed to the vulnerable method without additional sanitization by the consuming application. The issue is resolved in Apache Sling XSS version 2.4.12 and later.

Affected products

  • Apache Sling XSS 2.4.10 and prior

Timeline

  • 2026-09-23: disclosed

References

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