Critical severity · published Jul 17, 2026
CVE-2026-9198
Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation
In wildKEV
9.8
CVSS
28.7%
EPSS
Yes
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)28.7% · higher than 98% of CVEs
Exploited in the wildYes
CISA KEVListed Aug 4, 2026
Federal remediation dueAug 7, 2026
Ransomware campaign useNot known
Affected products
Which versions
LO
Langflow OSS · IBM
1.0.0 through 1.10.0 · source: vendor
LA
Langflow · Langflow
1.0.0 before 1.10.1 · source: NVD, KEV
In the news
VulnerabilityCritical
U.S. CISA adds Langflow, Apache Tomcat, and N-able N-central flaws to its Known Exploited Vulnerabilities catalog
U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Langflow, Apache Tomcat, and N-able N-central flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added the following vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog: The first issue added to the catalog, tracked as CVE-2026-9198, is a critical issue in IBM […]
Aug 5, 2026·Security Affairs
VulnerabilityCritical
CISA Flags Langflow RCE, Tomcat, and N-central Flaws as Actively Exploited
The U.S. Cybersecurity and Infrastructure Security Agency (CISA), on August 5, 2026, added three flaws to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation in the wild. The list of vulnerabilities is as follows - CVE-2026-9198 (CVSS score: 9.8) - A code injection vulnerability in Langflow that allows unauthenticated attackers to achieve full remote
Aug 5, 2026·The Hacker News
AdvisoryHigh
CISA Adds Three Known Exploited Vulnerabilities to Catalog
CISA has added three new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation.   CVE-2026-9198 IBM Langflow Code Injection Vulnerability CVE-2026-18556 N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability CVE-2026-34486 Apache Tomcat Missing Encryption of Sensitive Data Vulnerability These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. BOD 26-04 reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures (CVEs) listed in CISA’s KEV Catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 further establishes basic expectations for when agencies must check whether threat actors compromised the system before the patch was applied. While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV Catalog vulnerabilities . CISA will continue to add ...
Aug 4, 2026·CISA Advisories
VulnerabilityCritical
[CISA KEV] CVE-2026-9198: IBM Langflow - IBM Langflow Code Injection Vulnerability
Langflow contains a code injection vulnerability that allows unauthenticated attackers to achieve full remote code execution on default Langflow deployments.
LALangflowCVE-2026-9198
Aug 4, 2026·CISA KEV
Affected product
LO
Langflow OSS
IBM
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