EUVD-2026-75723
GHSA-v63q-2gxx-5p2w
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Network-reachable API endpoint, no special conditions, low-privilege auth required; confidentiality-only impact from cross-user file read.
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
Lifecycle Timeline
2DescriptionCVE.org
IBM Langflow OSS 1.0.0 through 1.11.5 Langflow could allow an authenticated attacker to access sensitive files belonging to other users due to improper access control in the File/Read File component. When executing flows through the /api/v1/run/advanced/{flow_id} endpoint, the application allows component inputs to reference storage paths using arbitrary user or flow identifiers without verifying ownership. An attacker with low‑privileged authenticated access can supply a crafted file path pointing to another user’s storage namespace, causing the backend to read and return the contents of files uploaded by other users. This vulnerability bypasses intended authorization checks enforced by the file management API and may result in unauthorized disclosure of sensitive user data.
AnalysisAI
Cross-user file disclosure in IBM Langflow OSS 1.0.0-1.11.5 allows any authenticated low-privileged user to read files uploaded by other users by supplying arbitrary storage path identifiers in flow component inputs. The File/Read File component, when invoked via the /api/v1/run/advanced/{flow_id} endpoint, accepts user or flow storage namespace identifiers without verifying the requester owns the referenced namespace - a classic IDOR (CWE-639). …
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Vulnerability AssessmentAI
| Exploitation | Requires a valid authenticated low-privilege account on the IBM Langflow OSS instance (PR:L confirmed by CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N yields a score of 6.5, which is well-calibrated for this vulnerability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patch per the IBM Security advisory at https://www.ibm.com/support/pages/node/7286657, which should be consulted for the exact fixed version number (not independently confirmed in available data). … Detailed patch versions, workarounds, and compensating controls in full report. |
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