CVE-2026-27429
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 Nifty <= 1.4.1 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 Nifty versions 1.4.1 and below allows remote attackers to inject malicious PHP objects through insecure deserialization of untrusted input, potentially achieving remote code execution via magic methods.
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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Identify if Nifty software is installedCheck for the presence of Nifty application files in the web root or document directory. Look for directories or files containing 'nifty' in the name, or check the application's index page for branding that identifies it as Nifty.Affected if The Nifty application is present on the server
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Determine the installed Nifty versionCheck the application source code for a version file, composer.json, or a configuration file that displays the version number. Common locations include a version.php file, README, or the admin dashboard about page.Affected if The installed version is 1.4.1 or below, or the version cannot be determined and the software appears to be Nifty
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Locate deserialization code in the applicationSearch PHP source files for usage of unserialize() function. Use grep or a file search tool to find 'unserialize' in the application code, particularly in files that handle user input, request parameters, or cookie values.Affected if Code contains unserialize() calls that process input from untrusted sources (GET, POST, cookies, or API requests)
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Check if deserialization endpoints are exposed without authenticationReview the identified unserialize() entry points and determine if they are protected by authentication checks. Examine the code surrounding the unserialize calls to see if there are any access control conditions (like session checks, login验证) before the deserialization occurs.Affected if The deserialization functionality can be reached by unauthenticated users (no login or session required)
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Inspect for magic method usage in the codebaseSearch PHP files for magic method definitions such as __destruct(), __wakeup(), __toString(), or __invoke that could be triggered by injected PHP objects.Affected if The application defines magic methods in included PHP classes that could be leveraged for RCE if object injection occurs
A user is affected if they have Nifty version 1.4.1 or below running with unauthenticated deserialization endpoints that use unserialize() on untrusted 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 newer than 1.4.1 if available; otherwise, implement strict whitelist-based input validation on all deserialization entry points and replace unserialize() with safer alternatives like JSON decoding.
- Consultation4.0 h
- Implementation8.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,656.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-27429 — 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-2026-27429 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