Vulnerability record/PUBLISHED/Published Oct 29, 2026 15:19:09 UTC

CVE-2026-18894

IBM Langflow OSS 1.0.0 through 1.12.4 could allow a remote attacker to trigger pre-existing stored Python component code in a public workflow, executing it under the flow owner's runtime context within the server process. This bypasses the intended trust boundary where public execution paths are restricted to server-trusted component code.

Base score6.5/ 10

SeverityMediumCVSS 3.1

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityMedium

Attack vectorNetworkAV

Attack complexityLowAC

Privileges requiredNonePR

User interactionNoneUI

ScopeUnchangedS

Confidentiality impactLowC

Integrity impactLowI

Availability impactNoneA

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

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering Authorityibm

Last updatedOct 29, 2026 19:38:15 UTC

PublishedOct 29, 2026 15:19:09 UTC

ReservedAug 4, 2026 19:51:55 UTC