CVE-2026-9198
CriticalExploitedPublic exploitIBM 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
Published Jul 17, 2026 · Updated Aug 19, 2026
Key Facts
Patch immediately- CVE-2026-9198 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Langflow Oss (Ibm), Langflow.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 4, 2026. Public exploit code is available.
- EPSS estimates a 29% probability of exploitation in the next 30 days.
- Fixed versions are available, including Langflow 1.10.1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
29%
Higher than 98.1% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
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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
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Aug 4, 2026 | Aug 7, 2026 | Not reported |
| Industry KEV feed | Aug 4, 2026 | Aug 7, 2026 | Not reported |
| CIRCL KEV | Aug 4, 2026 | Aug 7, 2026 | Not reported |
| ENISA EUVD | Aug 4, 2026 | n/a | Not reported |
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Langflow OssIbm | 1.0.0, 1.10.0 | n/a |
| LangflowLangflow | See advisory | 1.10.1 |
Patched Releases
Langflow
1.10.1
Timeline
Publicly disclosed
Jul 17, 2026
Added to CISA KEV
Aug 4, 2026
Added to Industry KEV feed
Aug 4, 2026
Added to CIRCL KEV
Aug 4, 2026
Added to ENISA EUVD
Aug 4, 2026
Last updated
Aug 19, 2026
Weakness Type
- CWE-94 Improper Control of Generation of Code ('Code Injection')
References
- advisoryhttps://www.ibm.com/support/pages/bulletin/
- advisoryUSOM advisory
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
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
Affected: Langflow Oss (Ibm) versions 1.0.0, 1.10.0; Langflow. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 4, 2026.
Yes. It was added on Aug 4, 2026 with a federal remediation due date of Aug 7, 2026.
Public exploit code is available.
Fixed versions are available, including Langflow 1.10.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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