CVE-2026-40735
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 · uneditedUnauthenticated PHP Object Injection in Reina <= 2.1 versions.
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 confidenceUnauthenticated PHP Object Injection vulnerability in Reina versions 2.1 and earlier. The vulnerability allows remote attackers to inject malicious PHP objects into the application's deserialization process without authentication, potentially leading to remote code execution if suitable POP gadget chains exist in the application or its dependencies.
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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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 Reina installation and versionLocate the Reina application files and check the version identifier in the main application file, configuration, or composer.json. Common locations include the root directory or a /src folder.Affected if The installed version is 2.1 or earlier (version number less than or equal to 2.1)
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Locate deserialization codeSearch the application source code for calls to unserialize() function. Review PHP files in the application root, includes, lib, or src directories.Affected if The application uses unserialize() on any user-supplied data from $_GET, $_POST, $_COOKIE, or similar input sources without prior sanitization.
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Verify input source is user-controlledExamine the unserialize() calls found and trace the data source. Determine if the data originates from request parameters, headers, cookies, or other user-controllable input.Affected if The unserialize() function processes data that can be controlled by an unauthenticated remote attacker without validation.
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Confirm unauthenticated accessTest access to the identified vulnerable endpoint without providing authentication credentials. Check if the deserialization occurs before or without any authentication check.Affected if The vulnerable deserialization endpoint is accessible without authentication (no login or session required).
You are affected if Reina version 2.1 or earlier is installed AND the application uses unserialize() on unauthenticated user-controlled input.
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 dataUpgrade to a patched version of Reina (version > 2.1) if available. If no patch exists, audit code for unsafe unserialize() calls on user-controlled input and replace with json_decode; implement proper input validation and consider web application firewall rules as temporary mitigation.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-40735 — 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-2026-40735 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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