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… (CVE-2026-12763)
IBM Langflow OSS versions 1.0.0 through 1.11.5 contain a vulnerability in the MCP Tools component where improper cache key isolation allows an authenticated attacker to access another user's MCP server context. This issue could lead to limited confidentiality and integrity impacts but does not affect availability.
AI Analysis
Technical Summary
CVE-2026-12763 describes a vulnerability in IBM Langflow OSS from versions 1.0.0 through 1.11.5. The flaw arises from improper cache key isolation within the MCP Tools component, enabling an authenticated attacker to access the MCP server context of another user. This cross-user context access could lead to unauthorized information disclosure and potential modification of data within the affected context.
Potential Impact
The vulnerability allows an authenticated attacker to access another user's MCP server context, resulting in limited confidentiality and integrity impacts. There is no indication of availability impact. The CVSS v3.1 base score is 4.2 (medium severity), reflecting the requirement for network access, high attack complexity, low privileges, and no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is released, limit access to trusted authenticated users and monitor for unusual activity related to MCP server context access.
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… (CVE-2026-12763)
Description
IBM Langflow OSS versions 1.0.0 through 1.11.5 contain a vulnerability in the MCP Tools component where improper cache key isolation allows an authenticated attacker to access another user's MCP server context. This issue could lead to limited confidentiality and integrity impacts but does not affect availability.
CVSS v3.1
Score 4.2medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12763 describes a vulnerability in IBM Langflow OSS from versions 1.0.0 through 1.11.5. The flaw arises from improper cache key isolation within the MCP Tools component, enabling an authenticated attacker to access the MCP server context of another user. This cross-user context access could lead to unauthorized information disclosure and potential modification of data within the affected context.
Potential Impact
The vulnerability allows an authenticated attacker to access another user's MCP server context, resulting in limited confidentiality and integrity impacts. There is no indication of availability impact. The CVSS v3.1 base score is 4.2 (medium severity), reflecting the requirement for network access, high attack complexity, low privileges, and no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is released, limit access to trusted authenticated users and monitor for unusual activity related to MCP server context access.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-vhrg-69rg-gwv4
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-12763"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa8a1c355bf5e2cf5f3e0f0
Added to database: 09/15/2026, 01:39:15 UTC
Last enriched: 09/15/2026, 01:57:56 UTC
Last updated: 09/15/2026, 03:01:22 UTC
Views: 2
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