CVE-2026-24186
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 · uneditedNVIDIA FLARE SDK contains a vulnerability in FOBS, where an attacker may cause deserialization of untrusted data by sending a malicious FOBS- encoded message. A successful exploit of this vulnerability might lead to code execution.
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 confidenceNVIDIA FLARE SDK contains a deserialization vulnerability in its FOBS component. An attacker can send a malicious FOBS-encoded message that, when deserialized by the SDK, can lead to arbitrary code execution on the target system.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 2.7.2CVSS 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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Check installed Nvflare SDK versionRun 'pip show nvflare' or 'pip list | grep nvflare' to see the installed version. Alternatively, import nvflare and print its __version__ attribute.Affected if The installed version is lower than 2.7.2 (e.g., 2.7.1, 2.6.0, etc.)
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Verify FOBS component is in useSearch project code for imports of 'fobs' or usage of FOBS serialization (e.g., 'from nvflare.fobs import...', 'FOBS.dumps()', 'FOBS.loads()'). Check if any custom components use FOBS for message encoding/decoding.Affected if FOBS is imported or used in any code that processes external input
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Check for exposed FOBS network interfacesReview application logs, configuration files, or network service definitions for listeners that accept FOBS-encoded messages. Look for ports or endpoints that deserialize FOBS data from network sources.Affected if Any network service or API endpoint accepts and deserializes FOBS-encoded input from external sources
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Review deserialization sinksInspect code that calls FOBS deserialization methods (loads, deserialize) on data received from untrusted sources such as network requests, files, or message queues.Affected if FOBS deserialization is performed on data originating from untrusted or external sources without prior validation
You are affected if Nvflare version is below 2.7.2 AND FOBS deserialization is performed on external input exposed over network interfaces.
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.
dbcve · scoped2.7.2
Until an official patch is released, restrict processing of FOBS-encoded data to trusted sources only and implement strict input validation on any FOBS messages received. Monitor NVIDIA security advisories for patch availability.
2.7.2
- 1. Identify the current version of NVIDIA FLARE SDK (Nvflare) installed in your environment
- 2. If the version is below 2.7.2, plan for upgrade to version 2.7.2 or later
- 3. Review the NVIDIA FLARE SDK release notes for version 2.7.2 to understand changes and ensure compatibility with your workflows
- 4. Backup any existing configurations and data before upgrading
- 5. Upgrade Nvflare to version 2.7.2 or later using the appropriate package manager (e.g., pip install nvflare>=2.7.2)
- 6. Verify the upgrade was successful by checking the installed version (nvflare --version)
- 7. Test that your FLARE workflows and FOBS functionality operate correctly with the new version
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation16.0 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-2026-24186 — 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-2026-24186 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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