CVE-2026-40836
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 · uneditedAn low privileged remote attacker can exploit an unauthenticated SQL Injection vulnerability in the inmessage model due to improper neutralization of special elements in a SQL DELETE command allowing for reading the whole database and deleting entries in a non critical table. This can result in a total loss of confidentiality and some loss of integrity.
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 · high confidenceAn unauthenticated SQL injection vulnerability exists in the inmessage model's DELETE command due to improper neutralization of special elements. This allows attackers to read the entire database and delete entries from non-critical tables.
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
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/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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Locate the inmessage model in your codebaseSearch your application source code for files containing 'inmessage' model definitions, particularly DELETE-related methods or functions.Affected if The inmessage model with a DELETE command exists in your application
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Verify if DELETE endpoint is unauthenticatedReview the routing configuration and authentication middleware for the DELETE operation in the inmessage model. Check if the route requires any authentication tokens, sessions, or credentials.Affected if The DELETE endpoint for inmessage model does not enforce authentication
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Inspect SQL query construction in DELETE handlerExamine the DELETE command implementation in the inmessage model code. Look for string concatenation, string formatting, or dynamic query building where user input is directly inserted into SQL statements without using parameterized queries or prepared statements.Affected if The DELETE query is constructed using string interpolation or concatenation with user-supplied input without proper escaping or parameterization
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Test DELETE endpoint for SQL injectionIf the endpoint is accessible without authentication, send a DELETE request with SQL injection payloads in the message identifier parameter (such as single quotes, UNION SELECT, or OR 1=1 constructs) and observe database behavior or error responses.Affected if The DELETE operation accepts and processes SQL injection payloads, resulting in unexpected database queries or errors
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Check database access logs for unauthorized queriesReview database query logs or enable query logging temporarily. Look for DELETE or SELECT statements targeting tables outside the inmessage model that originate from the inmessage DELETE operation.Affected if Database logs show arbitrary database queries or deletions from non-inmessage tables initiated through the DELETE endpoint
Your environment is affected if your application contains an inmessage model with an unauthenticated DELETE endpoint that uses unsafe SQL query construction.
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 parameterized queries (prepared statements) for all SQL DELETE operations in the inmessage model to properly neutralize special elements and prevent SQL injection.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-40836 — 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-2026-40836 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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