HighCVE-2026-124621

Kongxin-github Java_Library_Management_System: Incorrect Privilege Assignment (CVE-2026-124621)

Published 09.11.2026Last modified 09.11.2026Sources: CVE.org

What is affected, what to do

The available sources name no fixed version. Check the vendor guidance in the references below.

Not sure whether and how you are affected? Ask a question about this vulnerability

Metrics

7.4

Priority

XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

Source: NVD, CVSS v3

7.4

CVSS v3

Severity High on the scale from 0 to 10.

Source: CVE.org

—

EPSS score

No value is available for this vulnerability.

Show all metrics

Severity: High
Priority (0–325) The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first? Read in glossary: 67.00 Methodology
Exploit maturity An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack. Read in glossary: no public PoC known
XIEM Effective CVSS XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command. Read in glossary: 7.4 Methodology
CVSS v3 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 7.4
CVSS v4 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 5.3
KEV status The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: —
Published: 09.11.2026
CISA assessment (SSVC): Exploitation: proof of concept · not automatable · Technical impact: partial; Source: CISA Vulnrichment, as of 9 November 2026
CWE CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect. Read in glossary: CWE-285, CWE-266

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2 NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management. Read in glossary: High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
CRA The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates. Read in glossary: From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001 ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security. Read in glossary: Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

A vulnerability was determined in kongxin-github Java_Library_Management_System up to 70a6eb6b96fe64575d8051f1a59055bfc5dc5885. This affects the function UpdateAdmin.deleteuser/UpdateAdmin.updateadmin/UpdateAdmin.updatepass/Book.addbook/Book.modifybook/Book.deletebook/Category.addcategory/Category.setcategory/Landing.sureadmin of the file src/view/MainInterface.java of the component Swing UI Layer. This manipulation causes improper authorization. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. This product follows a rolling release approach for continuous delivery, so version details for affected or updated releases are not provided. The project was informed of the problem early through an issue report but has not responded yet.

Source: cvelistv5, NVD (NIST)

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

Affected products
		Affected versions	Fixed in
kongxin-github	Java_Library_Management_System	`—`	—

Weakness classes (CWE)

CWE-285Improper Authorization
Class
The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
Entry at MITRE CWE-285
CWE-266Incorrect Privilege Assignment
Base
A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.
Entry at MITRE CWE-266

References & sources

github.comkongxin-github/Java_Library_Management_SystemProduct
github.comkongxin-github/Java_Library_Management_System/issues/4Exploit, Issue tracking
vuldb.comCVE-2026-124621 | CVE Analysis and ReportThird-party advisory
vuldb.comSubmit #1040541 | kongxin-github Java_Library_Management_System 70a6eb6b96fe64575d8051f1a59055bfc5dc5885 Client-Side Enforcement of Server-Side SecurityThird-party advisory
vuldb.comVDB-433046 | kongxin-github Java_Library_Management_System Swing UI Layer MainInterface.java Landing.sureadmin improper authorizationVulnerability database, Technical description
vuldb.comVDB-433046 | CTI Indicators (IOB, IOC, TTP, IOA)signature, Permissions required

Changes to this CVE

Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

09.11.2026Record modifiedCISA ADP

CISA assessment (SSVC): exploitation: proof of concept, automatable: no

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
SSVC assessment	added	—	{"id":"CVE-2026-124621","role":"CISA Coordinator","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-11-09T11:38:34.347003Z"}

Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

09.11.2026ReceivedVulDB

CVSS V4.0: AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P

CVSS V3.1: AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L

CVSS V2: (AV:N/AC:L/Au:S/C:P/I:P/A:P)

Weakness type: CWE-285, CWE-266

Description added or changed

New references:

and 2 more references

Show 13 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Description	added	—	A vulnerability was determined in kongxin-github Java_Library_Management_System up to 70a6eb6b96fe64575d8051f1a59055bfc5dc5885. This affects the function UpdateAdmin.deleteuser/UpdateAdmin.updateadmin/UpdateAdmin.updatepass/Book.addbook/Book.modifybook/Book.deletebook/Category.addcategory/Category.setcategory/Landing.sureadmin of the file src/view/MainInterface.java of the component Swing UI Layer. This manipulation causes improper authorization. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. This product follows a rolling release approach for continuous delivery, so version details for affected or updated releases are not provided. The project was informed of the problem early through an issue report but has not responded yet.
CVSS	added	—	AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS	added	—	AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
CVSS	added	—	(AV:N/AC:L/Au:S/C:P/I:P/A:P)
Weakness type (CWE)	added	—	CWE-285
Weakness type (CWE)	added	—	CWE-266
Affected versions (publisher)	added	—	New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/124xxx/CVE-2026-124621.json">CVE-2026-124621</a>
Reference	added	—	https://github.com/kongxin-github/Java_Library_Management_System/
Reference	added	—	https://github.com/kongxin-github/Java_Library_Management_System/issues/4
Reference	added	—	https://vuldb.com/cve/CVE-2026-124621
Reference	added	—	https://vuldb.com/submit/1040541
Reference	added	—	https://vuldb.com/vuln/433046
Reference	added	—	https://vuldb.com/vuln/433046/cti

Source identifier: cna@vuldb.com

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