CVE-2026-9579
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA vulnerability was found in JeecgBoot up to 3.9.1. Impacted is the function user.getUsername of the file /sys/user/login/setting/userEdit of the component SysUser. The manipulation of the argument userIdentity results in improper access controls. The attack may be launched remotely. The exploit has been made public and could be used. Upgrading to version 3.9.2 is recommended to address this issue. The affected component should be upgraded.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceJeecgBoot versions up to 3.9.1 contain an improper access control vulnerability in the SysUser component. The userEdit endpoint at /sys/user/login/setting/userEdit fails to properly validate authorization when manipulating the userIdentity argument in the user.getUsername function, allowing unauthorized users to potentially access or modify other user accounts.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify JeecgBoot installation and versionLocate the JeecgBoot application and determine its version number (check build files, application metadata, or admin interface)Affected if The installed version is 3.9.1 or earlier (any version up to and including 3.9.1)
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Verify the vulnerable endpoint existsConfirm the /sys/user/login/setting/userEdit endpoint is exposed in the application (check application routes or web.xml if accessible)Affected if The endpoint is present and accessible without additional authentication safeguards
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Check access control configuration for the userEdit functionReview the authorization configuration for the SysUser component's userEdit functionality to determine if userIdentity parameter manipulation is possibleAffected if The userIdentity parameter can be manipulated to bypass authorization checks on the userEdit endpoint
You are affected if running JeecgBoot version 3.9.1 or earlier AND the /sys/user/login/setting/userEdit endpoint is accessible with the ability to manipulate the userIdentity parameter to bypass access controls.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedUpgrade JeecgBoot to version 3.9.2 or later. As this is a medium-severity access control bypass with public exploits available, prioritize patching promptly.
JeecgBoot 3.9.2
- 1. Back up the current JeecgBoot installation and database before upgrading
- 2. Download JeecgBoot version 3.9.2 from the official repository
- 3. Review the release notes for version 3.9.2 to understand changes and any required migration steps
- 4. Deploy version 3.9.2 to your environment following standard upgrade procedures
- 5. Verify the /sys/user/login/setting/userEdit endpoint now properly enforces access controls on the userIdentity parameter
- 6. Test that normal user workflows function correctly after the upgrade
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-9579 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-9579 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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