RCE in Xuxueli Xxl-Job
CVE-2026-90488
A vulnerability was determined in Xuxueli xxl-job up to 3.4.2. This affects the function GroovyClassLoader.parseClass of the file xxl-job-core/src/main/java/com/xxl/job/core/glue/GlueFactory.java. This manipulation causes code injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (33.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.3% 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: 0.004 · change: 0.000
Affected products
- Xuxueli Xxl-Job — versions 3.4.0, 3.4.1, 3.4.2
Weakness classification (CWE)
References
- vuldb.com/vuln/403076 (technical-description, vdb-entry)
- vuldb.com/vuln/403076/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-90488 (third-party-advisory)
- vuldb.com/submit/888470 (third-party-advisory)
- github.com/zhaizejiang/xxl-job-vuln-poc/blob/main/xxl-job v3.4.2 Remote Code Ex… (exploit)
Frequently asked questions
- What is CVE-2026-90488?
- CVE-2026-90488 is a medium-severity vulnerability in Xuxueli Xxl-Job, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-09-13.
- How severe is CVE-2026-90488?
- Medium severity. CVSS v3 base score is 6.3 out of 10.