CVE-2026-36720
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 · uneditedInsecure permissions in bookcars v8.3 allows authenticated attackers to escalate privileges from user to admin via modifying their user type.
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 confidencebookcars v8.3 contains a broken access control vulnerability where authenticated regular users can modify their own user type field to escalate privileges to administrator. The application fails to properly validate authorization when a user attempts to update their account settings, allowing any authenticated user to grant themselves admin permissions.
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
- High
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
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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Confirm bookcars deployment and versionIdentify if the bookcars application is running in your environment. Check application files, dependencies, or the login/admin page for version number v8.3.Affected if bookcars version 8.3 is deployed in the environment
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Locate user type modification API endpointExamine the application API routes, especially those handling user profile updates or role changes. Common patterns include /api/user/:id, /api/profile/update, or endpoints accepting a 'type' or 'role' parameter.Affected if An API endpoint exists that accepts user type or role as a parameter
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Verify authentication is required for the endpointTest the identified endpoint with an unauthenticated request. Then test with a standard (non-admin) authenticated user session to confirm the endpoint accepts authenticated requests.Affected if Standard authenticated users can access the user type modification endpoint without receiving authorization errors
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Test privilege escalation from non-admin accountUsing a standard user account, send a request to the user modification endpoint with a user type value set to 'admin' or '1' (administrator). Observe if the request succeeds and if the user's role is actually changed.Affected if A non-admin user can successfully change their own user type to administrator through the API request
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Inspect server-side authorization logicReview the backend code handling the user type modification endpoint. Look for authorization checks that verify the requesting user has admin privileges before allowing role/type changes.Affected if No server-side authorization check exists, or the check can be bypassed by the user modifying their own record
If bookcars v8.3 is running and any authenticated user can modify their own user type to administrator through the API without server-side authorization verification, the environment is affected by CVE-2026-36720.
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.
From vendor dataImplement server-side authorization checks to ensure users cannot modify their own user type or role. Enforce role-based access control (RBAC) at the API layer and validate permissions before any user profile updates.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-36720 — 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-2026-36720 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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