EUVD-2026-78087
GHSA-vhrg-69rg-gwv4
Severity by source
AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Network-reachable, requires authentication and cache-collision timing (AC:H); limited cross-user confidentiality and integrity impact, no availability effect.
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
Lifecycle Timeline
2DescriptionCVE.org
IBM Langflow OSS 1.0.0 through 1.11.5 could allow an authenticated attacker to access another user's MCP server context due to improper cache key isolation in the MCP Tools component.
AnalysisAI
Improper cache key isolation in IBM Langflow OSS versions 1.0.0 through 1.11.5 allows an authenticated attacker to read and potentially manipulate another user's MCP (Model Context Protocol) server context by exploiting shared cache entries that are not scoped to individual user sessions. The MCP Tools component fails to include sufficient user-identity signals in cache keys, permitting cross-user context leakage. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid Langflow user account (CVSS PR:L confirms authentication is necessary). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-assigned CVSS 3.1 score of 4.2 (Medium) with vector AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N is credible and reasonably calibrated for this issue. … 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 | The vendor has released a patch; upgrade IBM Langflow OSS to a version above 1.11.5 as directed by the IBM advisory at https://www.ibm.com/support/pages/node/7286662. … Detailed patch versions, workarounds, and compensating controls in full report. |
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