CVE-2026-7803
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 · uneditedIBM Langflow OSS 1.0.0 through 1.10.0 could allow arbitrary code execution due to improper validation of flow nodes with missing or empty component type fields.
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 · high confidenceIBM Langflow OSS versions 1.0.0 through 1.10.0 fails to properly validate flow node configuration, specifically when component type fields are missing or empty. This input validation failure allows attackers to inject and execute arbitrary code through specially crafted flow nodes.
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>= 1.0.0, <= 1.10.0CVSS 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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Check installed Langflow versionRun 'pip show langflow' or check the package version in your Python environment, or look for version info in the running applicationAffected if The installed version is 1.0.0 through 1.10.0 inclusive
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Inspect flow node validation logicReview the code that handles flow node configuration parsing, specifically around component type field validation in your Langflow installationAffected if Flow nodes with missing or empty component type fields are accepted without rejection
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Test flow node creation endpointSubmit a flow node with an empty or missing component type field to the flow creation/update API and observe if it is acceptedAffected if The API accepts and processes flow nodes without validating that component type fields are present and non-empty
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Check for allowlist-based filteringExamine whether the application implements allowlist filtering for permitted component types in the flow node processing codeAffected if No allowlist filtering is implemented for component types
You are affected if your Langflow version is between 1.0.0 and 1.10.0 and your environment accepts flow nodes with missing or empty component type fields.
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 · scopedUpgrade to the patched version of IBM Langflow. If immediate patching is not possible, implement input validation to reject flow nodes with missing or empty component type fields, and apply allowlist-based filtering for permitted component types.
Langflow 1.10.1 or later
- 1. Verify current Langflow installation version using package manager or application metadata
- 2. Stop the Langflow service before performing upgrade
- 3. Upgrade Langflow to version 1.10.1 or later by running: pip install --upgrade langflow or using the appropriate package manager for your deployment
- 4. Verify the new version is installed: pip show langflow
- 5. Restart the Langflow service
- 6. Test that flow nodes with missing or empty component type fields are properly rejected and do not allow arbitrary code execution
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-7803 — 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-2026-7803 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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