EUVD-2026-71466
GHSA-g3x9-hm5j-gv7w
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Authenticated remote IDOR requires only low privileges; no interaction needed; read access to sensitive data is high-C, history injection is low-I, no availability impact.
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
6DescriptionNVD
IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote authenticated attacker to obtain sensitive information and inject messages into workflow history due to improper authorization.
AnalysisAI
Improper authorization (IDOR/CWE-639) in IBM Langflow OSS 1.0.0 through 1.10.2 allows a remote authenticated attacker to access other users' workflow data and inject messages into workflow history they do not own. The flaw stems from user-controlled keys not being validated against the authenticated session's authorization scope, enabling horizontal privilege escalation across tenant workflows. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold a valid authenticated account on the target IBM Langflow OSS instance (PR:L per CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.1 score with AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N reflects a realistic threat: a low-privileged authenticated attacker can exploit this remotely with no user interaction and no special attack complexity. … 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 referenced in the IBM security advisory at https://www.ibm.com/support/pages/node/7286294; the exact fixed version is not independently confirmed from available data but the advisory confirms patch availability. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all IBM Langflow OSS deployments and which versions are in use; review access logs for unauthorized cross-user workflow access. …
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