CRITICAL CISA KEV

CVE-2026-9198

Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation

CVSS v3

9.8

CRITICAL

EPSS Score

0.4%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

none

SSVC status

Description

IBM Langflow OSS 1.0.0 through 1.10.0 allows unauthenticated attackers to chain /api/v1/auto_login (mints SUPERUSER tokens to any network caller) with /api/v1/validate/code (executes user code via exec()) to achieve full RCE on default Langflow deployments

CISA Known Exploited Vulnerability

Date Added
8/4/2026
Patch Due Date
8/7/2026
Ransomware Use
Unknown

Technical details

CVSS v3 Vector
3.1
Published
7/17/2026
Last Modified
7/18/2026

Frequently asked questions

What is CVE-2026-9198?

IBM Langflow OSS 1.0.0 through 1.10.0 allows unauthenticated attackers to chain /api/v1/auto_login (mints SUPERUSER tokens to any network caller) with /api/v1/validate/code (executes user code via exec()) to achieve full RCE on default Langflow deployments

Is CVE-2026-9198 actively exploited?

Yes. CVE-2026-9198 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 8/7/2026.

What is the CVSS score for CVE-2026-9198?

CVE-2026-9198 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string 3.1.

Is CVE-2026-9198 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.

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