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PatchSiren cyber security CVE debrief

CVE-2026-9579 JeecgBoot CVE debrief

A low-severity improper access control vulnerability in JeecgBoot versions up to 3.9.1 allows authenticated remote attackers to manipulate the userIdentity parameter in the /sys/user/login/setting/userEdit endpoint's user.getUsername function. The vulnerability, published 2026-05-26, has a CVSS 4.0 score of 2.1 (LOW severity) and has been publicly disclosed with available exploit details. The vendor has released version 3.9.2 to address this issue.

Vendor
JeecgBoot
Product
JeecgBoot
CVSS
LOW 2.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-26
Original CVE updated
2026-07-23
Advisory published
2026-05-26
Advisory updated
2026-07-23

Who should care

Organizations running JeecgBoot versions 3.9.1 or earlier with authenticated user access to the SysUser management functionality should prioritize upgrading to version 3.9.2.

Technical summary

The vulnerability exists in the user.getUsername function within the SysUser component of JeecgBoot, specifically at the /sys/user/login/setting/userEdit endpoint. An authenticated attacker can remotely manipulate the userIdentity argument to bypass intended access controls. The attack complexity is low, requires no user interaction, and can be executed over the network. The vulnerability results in limited impacts to confidentiality, integrity, and availability. The exploit has been made public, increasing the risk of attempted exploitation.

Defensive priority

routine

Recommended defensive actions

  • Upgrade JeecgBoot to version 3.9.2 or later
  • Review access controls on /sys/user/login/setting/userEdit endpoint
  • Audit user privilege assignments for improper configurations
  • Monitor for anomalous requests to SysUser component endpoints

Evidence notes

Vulnerability affects JeecgBoot ≤3.9.1 via userIdentity parameter manipulation in SysUser component. CWE-266 (Incorrect Privilege Assignment) and CWE-284 (Improper Access Control) identified. Public exploit availability confirmed. Fix released in v3.9.2.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9579 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9579

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-9579 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9579

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.