CVE-2026-0769
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 · uneditedLangflow eval_custom_component_code Eval Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. Authentication is not required to exploit this vulnerability. The specific flaw exists within the implementation of eval_custom_component_code function. The issue results from the lack of proper validation of a user-supplied string before using it to execute python code. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26972.
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 confidenceLangflow contains a code injection vulnerability in the eval_custom_component_code function. The application evaluates user-supplied input directly through Python's eval() without sanitization, allowing remote unauthenticated attackers to execute arbitrary Python code in the context of the server process.
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= 1.3.2CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/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 environment. If using Docker, check the image tag or inspect the container metadata.Affected if The installed version is exactly 1.3.2 (the affected version)
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Locate eval_custom_component_code functionSearch the Langflow codebase (typically in a Python package) for the function named 'eval_custom_component_code'. Check files under the langflow/ directory for function definitions containing 'eval('.Affected if The function exists and uses Python's eval() on user input without sanitization
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Verify unauthenticated access to the vulnerable functionExamine the authentication/authorization configuration around the eval_custom_component_code endpoint. Check if the API route or function is accessible without authentication (no login token required).Affected if The function is exposed without requiring authentication
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Check network exposure of Langflow serviceDetermine if the Langflow service is listening on a network interface accessible from outside (0.0.0.0 or public IP) versus localhost only. Check service configuration or running process bind address.Affected if Langflow is exposed to untrusted networks (not restricted to localhost or VPN)
You are affected if you run Langflow version 1.3.2 AND the eval_custom_component_code function is accessible without authentication on a network-exposed instance.
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 dataRestrict network exposure of Langflow and implement proper input validation before evaluating code, or replace the eval() approach with safer alternatives such as restricted execution environments, sandboxing, or AST-based validation.
- Consultation4.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA4.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-0769 — 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-2026-0769 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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