Vulnerability details

CVE-2026-9198

Actively exploited

IBM Langflow OSS

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

CVSS 3.1

9.8Critical

Official 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

CVSS scores

Score	Version	Source	Vector
9.8Critical	3.1	CVEProject cvelistV5 (CNA) (ibm)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
IBM	Langflow OSS	1.0.0 ≤ v ≤ 1.10.0	CVEProject cvelistV5 (CNA)

References and advisories

https://www.ibm.com/support/pages/node/7278927 vendor-advisorypatch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-9198 government-resource

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Details

Published: 2026-07-17
Last updated: 2026-08-17
State: Published
Assigner (CNA): ibm
Kolun priority: 79 · High

CISA KEV catalog

Date added: 2026-08-04
Due date: 2026-08-07
Used in ransomware: Unknown

Exploit prediction (EPSS)

28.65%

Probability of exploitation in 30 days

98.1%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: Active
Technical impact: Total

Weaknesses (CWE)

CWE-94
Improper Control of Generation of Code ('Code Injection')