CVE-2026-7687
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 · uneditedA vulnerability was determined in langflow-ai langflow up to 1.8.4. Affected by this issue is the function CodeParser.parse_callable_details of the file src/lfx/src/lfx/custom/code_parser/code_parser.py of the component Full Builtins Module Handler. Executing a manipulation can lead to command injection. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
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 confidenceCommand injection vulnerability in langflow-ai langflow up to version 1.8.4 in the CodeParser.parse_callable_details function within src/lfx/src/lfx/custom/code_parser/code_parser.py. The function fails to properly sanitize input before executing, allowing remote attackers to inject arbitrary commands through the Full Builtins Module Handler.
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
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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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Determine installed langflow versionRun 'pip show langflow' or check your package manager to find the installed version of langflow-ai langflowAffected if The installed version is 1.8.4 or earlier (any version up to and including 1.8.4)
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Locate the vulnerable code fileSearch for the file src/lfx/src/lfx/custom/code_parser/code_parser.py in your langflow installation directoryAffected if The file exists and contains a function named parse_callable_details
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Inspect the parse_callable_details functionOpen code_parser.py and locate the parse_callable_details function to verify it performs input processing without proper sanitizationAffected if The function processes input and uses it in command execution without sanitization (compare to secure coding practices)
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Check if Full Builtins Module Handler is accessibleReview your langflow configuration and API endpoints to determine if the module handler that invokes parse_callable_details is exposed and accessibleAffected if The Full Builtins Module Handler endpoint is enabled and reachable (authentication may be required but the vulnerable function is accessible)
You are affected if langflow version 1.8.4 or earlier is installed AND the parse_callable_details function in code_parser.py is accessible through the Full Builtins Module Handler without input sanitization in place.
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 version beyond 1.8.4 when available. Until then, implement strict input validation and sanitization in the parse_callable_details function to prevent command injection, and restrict access to the affected endpoint.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA3.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-7687 — 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-2026-7687 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
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- Version or environment caveats, and links to real fixes
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