Langflow OSS is affected by arbitrary code execution in custom component validation and trusted code enforcement
Published Aug 5, 2026
7.1
HIGHCVSS 3.1
EPSS 0.30%
Description
IBM Langflow OSS 1.0.0 through 1.10.3 contain an authorization bypass vulnerability in the MemoryComponent that allows authenticated users to access chat history of other users via session_id collision. The MemoryComponent.retrieve_messages and store_message methods filter on session_id without validating flow_id or user_id ownership, enabling cross-user information disclosure through multiple authenticated API endpoints including /api/v1/run/*, /api/v1/responses, and /api/v2/workflow/*. This vulnerability only affects multi-user deployments with LANGFLOW_AUTO_LOGIN=False.
Affected products
-
- Version 1.0.0StatusaffectedConstraints<=1.10.3
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| IBM | Langflow OSS | n/a |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
IBM recommends upgrading to Langflow OSS 1.11.0 or newer https://github.com/langflow-ai/langflow/releases
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Aug 5, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.30% (0.00297) | 20.24th | v5 (v2026.06.15) |
| Aug 6, 2026 | 0.20% (0.00201) | 10.17th | v5 (v2026.06.15) |
References (1)
- https://www.ibm.com/support/pages/node/7282647 vendor-advisorypatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://www.ibm.com/support/pages/node/7282647 | vendor-advisorypatchVendor Advisory |
Change history (0)
No recorded changes yet.