# CVE-2026-108876: JeecgBoot missing authorization in putCancelQuit handler

Source: https://junglewise.ai/threats/cve-2026-108876-jeecgboot-through-3-9-5-contains-a-missing-authorization  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-11. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-108876 · Severity: medium · CVSS 4.3 · Published 2026-10-11

JeecgBoot is a Java-based application development framework. The putCancelQuit endpoint in SysUserController lacks proper authorization checks, allowing any authenticated user to reverse the offboarding of any user in any tenant by supplying user IDs and a tenant ID. This enables account takeover through restoration of revoked access, allowing low-privileged attackers to undo user resignations and restore their access to the system.

Technologies: [JeecgBoot](https://junglewise.ai/threats/technologies/jeecgboot). Vendors: [JeecgBoot](https://junglewise.ai/threats/vendors/jeecgboot).

## Quick answers

**Is CVE-2026-108876 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-108876 being exploited in the wild.

**How severe is CVE-2026-108876?** Medium severity, with a CVSS score of 4.3, published 11 October 2026.

**Which products and versions are affected?** JeecgBoot through 3.9.5.

**Is there a fix for CVE-2026-108876?** 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-2026-108876 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-108876?** Check whether you run JeecgBoot 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

Missing authorization in the PUT /sys/user/putCancelQuit endpoint allows authenticated users to set sys_user_tenant.status=1 for arbitrary user IDs and tenant IDs. The handler lacks @RequiresPermissions annotation while other handlers in the same controller use it 24 times. The tenantId is read from caller-controlled request parameters or X-Tenant-Id headers via TokenUtils.getTenantIdByRequest rather than being verified from the JWT, enabling cross-tenant attacks. The endpoint returns success (HTTP 200 with success:true) even when no rows are affected, concealing the true scope of the vulnerability.

## Affected products

- JeecgBoot JeecgBoot through 3.9.5

## Timeline

- 2026-10-11: disclosed

## References

- [https://github.com/AnkesKasty/cve-request-poc/blob/a7b6d1423555812d8efa26c91c5d0683164b31e5/JeecgBoot/poc_sys_user_cancel_quit.py](https://github.com/AnkesKasty/cve-request-poc/blob/a7b6d1423555812d8efa26c91c5d0683164b31e5/JeecgBoot/poc_sys_user_cancel_quit.py)
- [https://github.com/jeecgboot/JeecgBoot/blob/e3b9dc0aefe1943d9772b026f64ed671a7c82802/jeecg-boot/jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/system/controller/SysUserController.java](https://github.com/jeecgboot/JeecgBoot/blob/e3b9dc0aefe1943d9772b026f64ed671a7c82802/jeecg-boot/jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/system/controller/SysUserController.java)

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