CVE-2026-25358
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 rascals Meloo meloo allows Object Injection.This issue affects Meloo: from n/a through < 2.8.2.
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 confidenceThe Meloo application contains a deserialization vulnerability where untrusted data is being deserialized without proper validation, allowing an attacker to inject malicious objects. This type of flaw can lead to remote code execution if exploitable gadgets exist in the application's classpath.
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
- High
CVSS:3.1/AV:N/AC:L/PR:L/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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Confirm Meloo is installedSearch for Meloo application files, directories, or installed packages in your environment. Look for directories named 'meloo' or files containing 'meloo' in their metadata.Affected if Meloo is present in the environment and version is below 2.8.2
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Determine installed Meloo versionCheck version files, application metadata, or run version query commands specific to how Meloo was installed (e.g., look for version.txt, VERSION file, or application startup logs that report the version).Affected if The installed version cannot be determined or is lower than 2.8.2
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Locate deserialization code or configurationSearch the Meloo application source code or decompiled classes for usage of Java deserialization APIs such as ObjectInputStream, XMLDecoder, XStream, JSON deserialization libraries, or similar. Look for patterns like 'new ObjectInputStream', 'readObject()', or configuration files that enable deserialization.Affected if Code or configuration that deserializes untrusted data is found without apparent validation
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Identify data intake pointsReview application endpoints, APIs, file upload handlers, or message queue consumers that accept serialized data. Check configuration for settings related to data import, caching, or session management that may process serialized objects.Affected if The application accepts serialized data from untrusted sources (user input, external APIs, uploaded files)
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Audit classpath for known gadget librariesExamine the application's lib, classpath, or dependency manifests (pom.xml, build.gradle, MANIFEST.MF) for libraries known to contain deserialization gadgets (e.g., Apache Commons Collections, Spring Framework, Groovy, Jackson with polymorphic typing, XStream).Affected if Libraries containing known deserialization gadgets are present in the classpath
If Meloo is installed with a version below 2.8.2 and the application deserializes untrusted data via insecure methods, the environment is likely affected by this vulnerability.
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 Meloo to version 2.8.2 or later. If upgrading is not immediately possible, audit the codebase for deserialization of untrusted data and implement input validation or use safe serialization formats.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-25358 — 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-2026-25358 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
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