CVE-2026-12763 — MEDIUM (4.2)

Vulnerability Description

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.

CVSS Score

4.2

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-306

References

https://www.ibm.com/support/pages/node/7286662

FAQ

What is CVE-2026-12763?

CVE-2026-12763 is a vulnerability with a CVSS score of 4.2 (MEDIUM). 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.

How severe is CVE-2026-12763?

CVE-2026-12763 has been rated MEDIUM with a CVSS base score of 4.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-12763?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.