# CVE-2026-90487 — Xuxueli xxl-job

> As of 2026-09-12, CVE-2026-90487 is a MEDIUM-severity vulnerability in Xuxueli xxl-job, CVSS v3.1 4.3. No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-90487 as of 2026-09-12; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-12

## What is CVE-2026-90487?

A vulnerability was found in Xuxueli xxl-job up to 3.4.2. Affected by this issue is some unknown functionality of the file xxl-job-admin/src/main/java/com/xxl/job/admin/business/controller/JobGroupController.java. The manipulation results in improper privilege management. The attack may be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

The record classifies CVE-2026-90487 under weakness classes [CWE-269](https://intel.threadlinqs.com/cwe/CWE-269), [CWE-266](https://intel.threadlinqs.com/cwe/CWE-266). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 23 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 4.3 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R`)
- **CVSS v4.0 base score:** 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-12

## Is CVE-2026-90487 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **Xuxueli**: xxl-job

## How to fix CVE-2026-90487

No vendor patch reference has been recorded for CVE-2026-90487 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-90487

No threat campaign in the Threadlinqs corpus currently references CVE-2026-90487, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, GitHub Security Advisories. Last verified by Threadlinqs on 2026-09-14.

**Exploit and proof of concept**

- [github.com — exploit](https://github.com/zhaizejiang/xxl-job-vuln-poc/edit/main/xxl-job3.4.2_loadById%20Endpoint%20Missing%20Authentication.md)

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/403075/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-90487)
- [vuldb.com — third party advisory (888438)](https://vuldb.com/submit/888438)

**Vulnerability database entry**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/403075)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-90487
Full detection coverage and IOCs for threats exploiting CVE-2026-90487 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp