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JeecgBoot EUVDEUVD-2026-96602

| CVE-2026-108663 MEDIUM
Missing Authorization (CWE-862)
2026-10-10 VulnCheck GHSA-6qfv-pf2c-5773
5.3
CVSS 4.0 · Vendor: VulnCheck
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate as low-privileged user
  2. Exploit
    Craft PUT to deleteApply with chosen IDs
  3. Execution
    Server skips tenant authorization check
  4. Impact
    Delete pending application and notify rejection

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Requires a valid low-privileged authenticated account on the target JeecgBoot instance (CVSS PR:L) and that the multi-tenant feature be in use with at least one pending tenant-administrator application to delete. The attacker must be able to supply or enumerate valid tenantId, packId, and userId values for the targeted pending application. Limiting factors: exploitation is impossible for fully unauthenticated outsiders, impact is confined to rejecting/deleting pending tenant applications (no data disclosure or service outage), and instances not using JeecgBoot's tenant application workflow are not meaningfully affected.

Impact

This is a genuine-but-moderate issue, not a top priority. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N) and the description agree: a remote, low-privileged authenticated attacker can exploit it over the network with low complexity and no user interaction, so the core signals are internally consistent. However, impact is deliberately narrow - only VI:L (low integrity) is set, with no confidentiality (VC:N) and no availability (VA:N) impact, reflecting that the flaw lets an attacker reject/delete other tenants' pending administrator applications but does not expose data or take down the service. Publicly available POC code (VulnCheck advisory plus a GitHub exploit script) raises practical exploitability, but there is NO CISA KEV listing and no EPSS score provided, so there is no evidence of active exploitation - POC availability and in-the-wild exploitation are distinct signals and should not be conflated. Net: a real, easily-reproducible broken-access-control bug with authenticated prerequisites and limited integrity-only impact, consistent with its 5.3 (Medium) rating rather than a critical emergency.

Exploit ScenarioDerived

An attacker who holds any low-privileged account on a multi-tenant JeecgBoot instance enumerates or guesses tenantId/packId/userId values and sends a crafted PUT request to the SysTenantController deleteApply endpoint. Because the handler never checks that the caller owns or administers the target tenant, the pending tenant-administrator application is deleted and the applicant is notified of rejection. A public POC (poc_tenant_delete_apply.py) demonstrates the request, making reproduction trivial for any authenticated user.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 10, 2026

Missing authorization in JeecgBoot through 3.9.5 lets any authenticated, low-privileged user delete pending tenant-administrator applications belonging to other tenants via the SysTenantController deleteApply handler, which also sends rejection notifications to the affected applicants. Publicly available exploit code exists, though exploitation requires a valid low-privileged account plus valid or enumerable tenantId, packId and userId values for a pending application. Impact is limited to integrity of the tenant-onboarding workflow with no data disclosure or service outage, making this a genuine but moderate issue rather than a top-priority one.

RemediationAI

No vendor-released patch identified at time of analysis; the referenced GitHub link points to vulnerable code lines rather than a fix commit, and no fixed version is confirmed in the available data, so administrators should monitor the JeecgBoot project for a release later than 3.9.5 and the VulnCheck advisory at https://www.vulncheck.com/advisories/jeecgboot-through-3.9.5-missing-authorization-via-sys-tenant-deleteapply for updated guidance. Until a fix ships, the most direct compensating control is to add an explicit authorization check to the deleteApply endpoint (for example a permission annotation plus a server-side verification that the calling user administers the tenant identified in the request, and that tenantId, packId and userId are validated rather than trusted as supplied) and to ship that change as a local source patch or reverse-proxy rule; blocking PUT requests to /sys/tenant/deleteApply at the gateway or WAF offers immediate protection but risks breaking legitimate tenant-application administration and must be scoped to non-admin roles with monitoring. Organizations that do not use the tenant application workflow can disable the multi-tenant feature entirely, accepting the loss of that functionality, and in all cases should review recent tenant-application deletions for unexpected rejections and restrict the number of accounts permitted to reach the tenant management endpoints.

Affected VersionsENISA

JeecgBoot 0 ≤3.9.5

Affected Packages

euvd jeecgboot no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

JeecgBoot is a Spring Boot based low-code development platform whose multi-tenant administrative functions live in jeecg-module-system/jeecg-system-biz; the affected handler is SysTenantController.deleteApply (referenced at SysTenantController.java lines 849-853 in the vendor repository). The root cause is CWE-862 (Missing Authorization): the handler accepts PUT requests carrying caller-supplied tenantId, packId and userId parameters and performs the deletion without any permission or ownership check, so the server trusts identifiers supplied by the requester and acts on any tenant's pending application. This is a horizontal privilege escalation within an authenticated session rather than a truly unauthenticated bypass, which matches the CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N, integrity-only impact VI:L) and the independent CVSS 3.1 score of 5.3 (PR:L, I:L). The CPE cpe:2.3:a:jeecgboot:jeecgboot:*:*:*:*:*:*:*:* indicates the flaw is present across all tracked JeecgBoot releases up to and including 3.9.5, and only deployments that enable the multi-tenant feature and have at least one pending tenant-administrator application are meaningfully exposed.

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Severity by source

Vendor (VulnCheck) PRIMARY 5.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
vuln.today AI 4.3 MEDIUM

Remote low-complexity exploitation requires only a low-privileged authenticated account (PR:L), with no user interaction; impact is integrity-only (I:L) deletion of records, no confidentiality or availability effect.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
None
Vulnerable system: Integrity
Low
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

DescriptionCVE.org

JeecgBoot through 3.9.5 contains a missing authorization vulnerability in the SysTenantController deleteApply handler that allows any authenticated user to reject tenant administrator applications. Low-privileged attackers can send PUT requests with chosen tenantId, packId and userId values to delete pending applications in any tenant and notify applicants of rejection.

Threat Intelligence Overview

EPSS Score
0.2%
Top 92% exploitable
Prevalence
Medium
popular open-source low-code platform, strong China footprint, limited global enterprise use
Exploit
POC
Public exploit code exists
Social Media
1
Sightings
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC Yes
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

46
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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JeecgBoot up to v 3.5.1 was discovered to contain a SQL injection vulnerability via the component queryFilterTableDictIn

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JeecgBoot up to v 3.5.1 was discovered to contain a SQL injection vulnerability via the component queryTableDictItemsByC

CVE-2026-108623 HIGH POC
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CVE-2026-108648 HIGH POC
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Database credential disclosure in JeecgBoot through 3.9.5 allows any authenticated low-privileged user to retrieve JDBC

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Missing authorization in JeecgBoot through 3.9.5 lets any authenticated user enumerate record IDs through the unguarded

CVE-2026-108677 HIGH POC
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Authenticated low-privileged users of JeecgBoot through 3.9.5 can retrieve any other user's stored password ciphertext t

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Authenticated users of any privilege level on JeecgBoot through 3.9.5 can rewrite DingTalk, WeCom, or Feishu third-party

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