CVE-2026-27439
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 · uneditedDeserialization of Untrusted Data vulnerability in ThemeREX Dentario dentario allows Object Injection.This issue affects Dentario: from n/a through <= 1.5.
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 confidenceA PHP Object Injection vulnerability in the ThemeREX Dentario WordPress theme (versions <= 1.5) allows remote attackers to deserialize untrusted data, potentially leading to arbitrary code execution through malicious serialized objects. The vulnerability stems from unsafe use of PHP's unserialize() function on user-controlled input.
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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/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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Verify Dentario theme is installedAccess WordPress admin panel Appearance > Themes, or check /wp-content/themes/ directory for Dentario theme folderAffected if Dentario theme folder exists in the WordPress theme directory
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Check installed Dentario versionIn WordPress admin, view theme details page for Dentario, or open style.css in the theme folder and look for 'Version:' headerAffected if Version number is 1.5 or lower, or version cannot be determined (indicating older/unpatched release)
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Locate unserialize() calls in theme codeSearch theme PHP files for 'unserialize' pattern, particularly in files handling user input (functions.php, class files, AJAX handlers)Affected if Code contains unserialize() called on $_GET, $_POST, $_REQUEST, or other user-controlled parameters without validation
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Identify if user input reaches unserializeTrace data flow from user input to the unserialize() call - check if the parameter is directly passed to unserialize or comes from request headers/cookiesAffected if User-supplied data (GET/POST parameters, cookies, HTTP headers) flows directly into unserialize() without sanitization
Environment is affected if Dentario theme version 1.5 or lower is installed AND the theme code contains unserialize() calls processing untrusted user 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 dataUpdate to the latest patched version of Dentario theme. If no patch is available, locate and remediate any unserialize() calls on untrusted input, replacing with safe alternatives like json_decode. Audit for available gadget chains that could enable RCE.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-27439 — 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-2026-27439 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
- No spam, self-promotion, credentials, or personal data