CVE-2026-10561
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 1.9.3 has an vulnerability due to an improper isolation of Python execution combined with an authentication bypass that allows an unauthenticated attacker to execute arbitrary code on the host system, resulting in complete compromise
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 1.9.3 contains a critical vulnerability combining improper isolation of Python execution (allowing arbitrary code execution) with an authentication bypass, enabling unauthenticated attackers to achieve complete system compromise via remote code execution.
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, <= 1.9.3CVSS 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
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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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Identify installed Langflow versionRun 'pip show langflow' or check the package version in your Python environment, or query the Langflow API endpoint /api/v1/version if availableAffected if The installed version is 1.0.0 through 1.9.3 inclusive
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Confirm Langflow service is exposedCheck if the Langflow web interface or API is accessible over the network (verify listening ports and firewall rules for default ports 7860 or 8080)Affected if The service is accessible remotely without VPN or network segmentation
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Verify authentication enforcementAttempt to access the Langflow API endpoints without credentials to see if authentication is requiredAffected if API endpoints respond without requiring valid authentication tokens
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Review access logs for suspicious activityExamine Langflow server logs for unauthorized API calls, especially to code execution endpoints, from unexpected IP addressesAffected if Logs show unauthenticated requests to execution-related API paths or commands not initiated by legitimate administrators
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Check for unauthorized code execution artifactsLook for unexpected Python files, scripts, or reverse shells in the Langflow working directory or system temporary foldersAffected if Unexpected files exist that were not deployed by your team
Your environment is affected if Langflow version 1.0.0-1.9.3 is running and accessible, regardless of whether authentication is enabled since the authentication bypass can allow unauthenticated access.
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 dataImmediately upgrade to the patched version of IBM Langflow and conduct a forensic investigation to determine if the system has been compromised, as the CVSS 10 severity indicates likely active exploitation.
- Consultation8.0 h
- Implementation4.0 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-2026-10561 — 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-2026-10561 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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