Quick answers
- Is CVE-2026-90488 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-90488 being exploited in the wild.
- How severe is CVE-2026-90488?
- Medium severity, with a CVSS score of 6.3, published 13 September 2026.
- Which products and versions are affected?
- Xuxueli xxl-job up to 3.4.2.
- Is there a fix for CVE-2026-90488?
- 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-2026-90488 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-90488?
- Check whether anything you run is named in the advisory. 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 a code injection flaw in the GroovyClassLoader.parseClass function within GlueFactory.java. An attacker can inject malicious Groovy code that gets parsed and executed during class loading, leading to remote code execution. The attack is network-accessible and does not require authentication. Exploitation has been publicly disclosed with proof-of-concept code available; the vendor has not responded to early disclosure notifications. A patch status is not explicitly confirmed in the advisory.
Affected products
- Xuxueli xxl-job up to 3.4.2
Timeline
- 2026-09-13: disclosed
- other: Public proof-of-concept exploit available