CVE-2026-34046
Langflow is a tool for building and deploying AI-powered agents and workflows.
Published Mar 27, 2026 · corrected/updated Jun 17, 2026 · langflow langflow · evidence confidence medium
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.5.1, the helper in branched on the setting to decide whether to filter by . When was (i.e., authentication was enabled), neither branch enforced an ownership check — the query returned any flow matching the given UUID regardless of who owned it. This allowed any authenticated user to read any other user's flow, including embedded plaintext API keys; modify the logic of another user's AI agents, and/or delete flows belonging to other users. The vulnerability was introduced by the conditional logic that was meant to accommodate public/example flows (those with ) under auto-login mode, but inadvertently left the authenticated path without an ownership filter. The fix in version 1.5.1 removes the conditional entirely and unconditionally scopes the query to the requesting user.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-34046 is a high public vulnerability record for langflow langflow. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether langflow langflow is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: langflow/langflow; langflow/langflow (1.5.0); langflow/langflow-base. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 8.7. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-639, CWE-862. Sources contributing to this record: cve_org, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Mar 27, 2026 · NIST NVD
Detected
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.5.1, the helper in branched on the setting to decide whether to filter by . When was (i.e., authentication was enabled), neither branch enforced an ownership check — the query returned any flow matching the given UUID regardless of who owned it. This allowed any authenticated user to read any other us
Jun 17, 2026 · NIST NVD
Updated
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.5.1, the helper in branched on the setting to decide whether to filter by . When was (i.e., authentication was enabled), neither branch enforced an ownership check — the query returned any flow matching the given UUID regardless of who owned it. This allowed any authenticated user to read any other us
Affected
- cpe langflow/langflowversion unspecified
- cpe langflow/langflow1.5.0
- cpe langflow/langflow-baseversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-34046
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-34046
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.5.1, the helper in branched on the setting to decide whether to filter by . When was `Fals
nvd.nist.gov